CN117199718A - Battery module with short-circuit protection - Google Patents
Battery module with short-circuit protection Download PDFInfo
- Publication number
- CN117199718A CN117199718A CN202210600883.4A CN202210600883A CN117199718A CN 117199718 A CN117199718 A CN 117199718A CN 202210600883 A CN202210600883 A CN 202210600883A CN 117199718 A CN117199718 A CN 117199718A
- Authority
- CN
- China
- Prior art keywords
- cell group
- battery
- battery cell
- metal
- circuit protection
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 87
- 239000002184 metal Substances 0.000 claims abstract description 87
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to a battery module with short-circuit protection, comprising: the battery comprises a first battery cell group, a second battery cell group, a metal conducting plate and a metal wire. The electrode of the first side of the electric core of the first electric core group, the electrode of the second side, the electrode of the first side of the electric core of the second electric core group and the electrode of the second side are respectively contacted with different metal conducting plates, two ends of the metal wire are respectively connected with one metal conducting plate contacted with the first electric core group and one metal conducting plate contacted with the second electric core group in a wire bonding mode, the two metal conducting plates arranged by the metal wire are electrically connected only through the metal wire, and when the current passing through the metal wire is larger than the preset current, the metal wire is fused, so that the effect of short circuit protection is achieved.
Description
Technical Field
The invention relates to the technical field of battery modules, in particular to a battery module with short-circuit protection.
Background
In the battery module, the metal conductive sheets are fixed to the battery cells by spot welding, and thus the respective battery cells are connected by the metal conductive sheets. When the battery core is in thermal runaway, if the circuit cannot be interrupted in time, the influence of continuous large current can be expanded to damage the whole battery module. In addition, when the spot welding fails, the damaged battery core and the metal conducting plate are required to be removed. However, in the process of removing the metal conductive sheet, other welded battery cells and the metal conductive sheet connected with the battery cells are easily damaged, so that the whole battery module is damaged.
Disclosure of Invention
Therefore, the present invention provides a battery module with short-circuit protection function and capable of reducing the possible damage range of spot welding failure.
The invention provides a battery module with short circuit protection, which solves the problems in the prior art and comprises: the battery cell comprises a first battery cell group and a second battery cell group, wherein the first battery cell group and the second battery cell group are respectively provided with at least one battery cell, the first battery cell group and the second battery cell group are respectively provided with a first side and a second side, the electrodes of the battery cells of the first battery cell group and the second battery cell group at the first side are provided with a first polarity, the electrodes of the battery cells of the first battery cell group and the second battery cell group at the second side are provided with a second polarity, and the first polarity is opposite to the second polarity; the plurality of metal conducting strips, the electrode of the battery cell of the first battery cell group on the first side, the electrode of the battery cell of the first battery cell group on the second side, the electrode of the battery cell of the second battery cell group on the first side, and the electrode of the battery cell of the second battery cell group on the first side respectively contact different metal conducting strips, and the plurality of metal conducting strips are not contacted with each other; and one end of the metal wire is connected with one of the metal conductive plates contacting the first battery cell group in a wire bonding mode, the other end of the metal wire is connected with one of the metal conductive plates contacting the second battery cell group in a wire bonding mode, the two metal conductive plates arranged by the metal wire are electrically connected only through the metal wire, and when the current passing through the metal wire is larger than the preset current, the metal wire is fused.
In an embodiment of the invention, a battery module with short-circuit protection is provided, wherein a plurality of wires are electrically connected between two metal conductive sheets.
In an embodiment of the invention, a battery module with short-circuit protection is provided, wherein one of the metal conductive plates contacted by the metal wire is connected to the electrode of the first polarity of the battery cell, and the other metal conductive plate is contacted to the electrode of the second polarity of the battery cell.
In an embodiment of the invention, the metal conductive sheet is a nickel sheet.
In one embodiment of the present invention, a battery module with short-circuit protection is provided, wherein the metal wire is a copper wire.
In an embodiment of the invention, a battery module with short-circuit protection further includes a battery rack having a plurality of battery cell receiving holes for receiving the battery cells.
By adopting the technical means of the battery module with short-circuit protection, the first battery cell group and the second battery cell group are electrically connected by the metal wire, and when the current passing through the metal wire is larger than the preset current, the metal wire is fused. Therefore, when the first cell group or the second cell group has the cell to cause the overlarge current, the other cell group can be prevented from being influenced, the effect of short-circuit protection is achieved, and in the process of local short-circuit test, the thermal runaway caused by continuous high temperature of the battery module can be avoided. In addition, because the metal conducting strip connected with the first cell group and the metal conducting strip connected with the second cell group are not integrally connected, when the spot welding is invalid, the first cell group and the second cell group can be separated only by fusing the metal wire, and when the connected metal conducting strip of one cell group is dismantled, the damage of other cell groups caused by dismantling the metal conducting strip can be avoided.
Drawings
Fig. 1 is a perspective view of a battery module with short-circuit protection according to a first embodiment of the present invention.
Fig. 2 is a top view of a battery module with short-circuit protection according to a first embodiment of the present invention.
Fig. 3 is a partial side view schematically showing a battery module with short-circuit protection according to a first embodiment of the present invention.
Fig. 4 is a perspective view of a battery module with short-circuit protection according to a second embodiment of the present invention.
Fig. 5 is a top view of a battery module with short-circuit protection according to a second embodiment of the present invention.
Fig. 6 is a partial side view schematically showing a battery module with short-circuit protection according to a second embodiment of the present invention.
Fig. 7 is a partial side view schematically showing a battery module with short-circuit protection according to a third embodiment of the present invention.
Reference numerals
100. Battery module with short-circuit protection
1. First cell group
11. Battery cell
2. Second cell group
21. Battery cell
3. Metal conducting strip
4. Metal wire
5. Battery rack
Detailed Description
An embodiment of the present invention will be described below with reference to fig. 1 to 7. The description is not intended to limit the embodiments of the invention, but is one example of the invention.
As shown in fig. 1, a battery module 100 with short-circuit protection according to a first embodiment of the present invention includes: the battery comprises a first battery cell group 1, a second battery cell group 2, a plurality of metal conducting plates 3, metal wires 4 and a battery frame 5.
The battery module with short-circuit protection has more than two battery cell groups. Specifically, the battery module 100 with short-circuit protection in the present embodiment has three cell groups. The battery frame 5 has a plurality of battery cell accommodating holes for accommodating battery cells of the battery cell group. The metal conductive sheet 3 contacted by each cell group is not contacted with the metal conductive sheets 3 contacted by other cell groups. And the electric connection is formed only by the metal wires 4 between the electric core groups.
As shown in fig. 1 to 3, the number of the cells of each cell group in fig. 3 is merely illustrative. Wherein two adjacent cell groups are a first cell group 1 and a second cell group 2 respectively. The first cell group 1 has twelve cells 11 and the second cell group 2 has thirteen cells 21. The first cell set 1 and the second cell set 2 have a first side and a second side, respectively. The electrodes of the first battery cell group 1 and the second battery cell group 2 on the first side have a first polarity. The electrodes of the first cell set 1 and the second cell set 2 on the second side have a second polarity, and the first polarity is opposite to the second polarity.
In this embodiment, the first side of the first cell group 1 is a positive side, and the second side is a negative side. The first polarity is positive and the second polarity is negative.
As shown in fig. 3, the direction of the cells 21 of the second cell group 2 is opposite to the direction of the cells 11 of the first cell group 1. The first side of the second cell group 2 is a positive side, and the second side is a negative side. That is, the first side of the second cell group 2 is opposite to the first side of the first cell group 1. Of course, in other embodiments, the direction of the cells of the second cell group 2 and the direction of the cells of the first cell group may be the same.
The electrode of the battery cell 11 of the first battery cell group 1 at the first side, the electrode of the battery cell 11 of the first battery cell group 1 at the second side, the electrode of the battery cell 21 of the second battery cell group 2 at the first side, and the electrode of the battery cell 21 of the second battery cell group 2 at the second side are respectively contacted with different metal conductive sheets 3, and the metal conductive sheets 3 are not contacted with each other. Because the metal conducting strip 3 connected with the first cell group 1 and the metal conducting strip 3 connected with the second cell group 2 are not integrally connected, when the spot welding is invalid, the first cell group 1 and the second cell group 2 can be separated only by fusing the metal wire 4, and when the connected metal conducting strip 3 of one cell group is removed, the damage of other cell groups caused by removing the metal conducting strip 3 can be avoided.
The metal conductive sheet 3 is a nickel sheet. In other examples, the metal conductive sheet 3 may be other metals or alloys suitable for spot welding.
As shown in fig. 3, one end of the wire 4 is bonded to the metal conductive sheet 3 contacting the first side of the first cell group 1 in a wire bonding manner, and the other end of the wire 4 is bonded to the metal conductive sheet 3 contacting the second side of the second cell group 2 in a wire bonding manner. The wire 4 can be made of a material different from the metal conductive sheet 3 by wire bonding, and in this embodiment, the wire 4 is a copper wire. While in other embodiments the wire 4 may be an aluminum wire or other low melting point metal or alloy wire.
The two metal conductive sheets 3 provided with the metal wires 4 are electrically connected only by the metal wires 4. When the current through the wire 4 is greater than a predetermined current, the wire 4 is fused. Therefore, when the first cell set 1 or the second cell set 2 has the cell to cause the excessive current, the other cell set can be prevented from being influenced, the effect of short-circuit protection is achieved, and the battery module 100 with short-circuit protection can be prevented from being out of control due to continuous high temperature during the local short-circuit test.
As shown in fig. 3, the wire 4 is electrically connected between the positive electrode side electrode of the first cell group 1 and the negative electrode side electrode of the second cell group 2, so that the first cell group 1 and the second cell group 2 are connected in series. In other embodiments, the wire 4 may be formed by connecting two cell groups in parallel, as in the third embodiment shown in fig. 7.
As shown in fig. 2, according to the battery module 100 with short-circuit protection according to the first embodiment of the present invention, the number of wires 4 between two metal conductive sheets 3 electrically connected is five. Of course, the number of wires 4 is not limited thereto. The number and location of the wires 4 may vary depending on the available wire 4 gauge and the distribution of current to the metal conducting strip 3.
As shown in fig. 4 to 6, the number of the cells of each cell group in fig. 6 is merely illustrative. The battery module 100a with short-circuit protection according to the second embodiment of the present invention has the same circuit as the battery module 100 with short-circuit protection of the first embodiment. The main differences are: the battery module 100a with short-circuit protection of the second embodiment has seven cell groups. These cell groups are connected in series by wires 4. Each cell group has three cells.
As shown in fig. 7, the number of cells in each cell group is only shown as an example. The battery module 100b with short-circuit protection according to the third embodiment of the present invention has the same circuit as the battery module 100 with short-circuit protection of the first embodiment, with the main differences that: each cell group of the battery module 100 with short-circuit protection and the two connected metal conductive sheets 3 are split into two parallel cell groups and four metal conductive sheets 3 in total. The split metal conducting strips 3 are connected by metal wires 4, so that two connected cell groups are connected in parallel.
The foregoing description and description are only illustrative of the preferred embodiment of the invention, and other modifications will occur to those skilled in the art upon consideration of the specification and the preceding claims, but are intended to be within the spirit and scope of the invention.
Claims (6)
1. A battery module with short circuit protection, comprising:
the battery comprises a first battery cell group and a second battery cell group, wherein the first battery cell group and the second battery cell group are respectively provided with at least one battery cell, the first battery cell group and the second battery cell group are respectively provided with a first side and a second side, the electrodes of the battery cells of the first battery cell group and the second battery cell group at the first side are provided with a first polarity, the electrodes of the battery cells of the first battery cell group and the second battery cell group at the second side are provided with a second polarity, and the first polarity is opposite to the second polarity;
a plurality of metal conductive sheets, wherein the electrode of the battery cell of the first battery cell group on the first side, the electrode of the battery cell of the first battery cell group on the second side, the electrode of the battery cell of the second battery cell group on the first side, and the electrode of the battery cell of the second battery cell group on the second side are respectively contacted with different metal conductive sheets, and the plurality of metal conductive sheets are not contacted with each other; and
and one end of the metal wire is connected with one of the metal conducting plates contacting the first cell group in a wire bonding mode, the other end of the metal wire is connected with one of the metal conducting plates contacting the second cell group in a wire bonding mode, the two metal conducting plates arranged by the metal wire are electrically connected through the metal wire, and when the current passing through the metal wire is larger than the preset current, the metal wire is fused.
2. The battery module with short circuit protection according to claim 1, wherein the number of the wires between two of the metal conductive sheets electrically connected is plural.
3. The battery module with short circuit protection of claim 1, wherein one of said metallic conductive tabs contacted by said wire is connected to said electrode of said first polarity of said cell and the other of said metallic conductive tabs is contacted to said electrode of said second polarity of said cell.
4. The battery module with short circuit protection of claim 1, wherein the metal conductive sheet is a nickel sheet.
5. The battery module with short circuit protection of claim 1, wherein the metal wire is a copper wire.
6. The battery module with short circuit protection according to claim 1, further comprising a battery rack having a plurality of cell receiving holes for receiving the cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210600883.4A CN117199718A (en) | 2022-05-30 | 2022-05-30 | Battery module with short-circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210600883.4A CN117199718A (en) | 2022-05-30 | 2022-05-30 | Battery module with short-circuit protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117199718A true CN117199718A (en) | 2023-12-08 |
Family
ID=88991122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210600883.4A Pending CN117199718A (en) | 2022-05-30 | 2022-05-30 | Battery module with short-circuit protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117199718A (en) |
-
2022
- 2022-05-30 CN CN202210600883.4A patent/CN117199718A/en active Pending
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