Battery cell unit and battery module

Abstract

The invention discloses a battery cell unit and a battery module, the battery cell unit comprises a plurality of battery cells, an upper support and a lower support, the upper support and the lower support are provided with a first limiting groove, a second limiting groove, a third limiting groove and a fourth limiting groove, the first limiting groove and the third limiting groove are provided with first through holes, and the fourth limiting groove is provided with second through holes; second through holes are formed in the second limiting groove and the fourth limiting groove, the first limiting groove and the fourth limiting groove as well as the second limiting groove and the third limiting groove are all used for inserting the two ends of the battery cell, and the first boss and the second boss of the battery cell correspondingly penetrate through the first through hole and the second through hole; the depths of the first through hole and the second through hole are matched with the thicknesses of the first boss and the second boss, and the upper bracket and the lower bracket are provided with a first connecting part and a second connecting part which are combined and connected, so that a plurality of battery cells are mounted between the upper bracket and the lower bracket. The bracket of the battery cell unit can be matched with the battery cells of which the positive and negative electrode bosses are inconsistent in thickness, so that the battery cells can be effectively, quickly and efficiently assembled into groups.

Description

Technical Field

[0001] The present invention relates to the technical field of battery modules, and in particular to a battery core unit and a battery module. Background Art

[0002] The battery module is the core component of the battery. The battery module is usually composed of battery cells, brackets, BMS, collection lines and other components. For cylindrical battery cells, plug-in battery cell brackets are usually used to position and install the battery cells to ensure that the battery cells will not be displaced during normal operation. The mainstream cylindrical battery cell brackets include 18650 brackets, 26650 brackets, 32700 brackets, 34189 brackets, etc.

[0003] However, since the positive and negative poles of the sulfur dioxide cylindrical battery cell adopt a boss design with inconsistent size and thickness, which is different from the structure of common iron-lithium and ternary cylindrical battery cells, when the sulfur dioxide battery cells are assembled into groups, the existing battery cell brackets on the market are not compatible with the sulfur dioxide battery cells and cannot meet the needs of assembling the structure of the sulfur dioxide battery cells into groups. As a result, the sulfur dioxide battery cells cannot be assembled as quickly and efficiently as iron-lithium and ternary cylindrical batteries. Summary of the Invention

[0004] The object of the present invention is to provide a battery cell unit, wherein the bracket can match the battery cells with inconsistent thicknesses of the positive and negative electrode bosses, effectively realizing rapid and efficient assembly of the battery cells into groups.

[0005] Another object of the present invention is to provide a battery module in which the bracket of the battery cell unit can match the battery cells with inconsistent thickness of the positive and negative electrode bosses, effectively realizing the rapid and efficient assembly of the battery cells into groups.

[0006] In order to achieve the above object, the present invention discloses a battery cell unit, which includes:

[0007] A plurality of battery cells, each having a first boss and a second boss provided on both end surfaces thereof, wherein the thickness of the first boss is smaller than the thickness of the second boss;

[0008] An upper bracket and a lower bracket, the inner end surface of the upper bracket is alternately arranged with a plurality of first limiting grooves and second limiting grooves around its center, the inner end surface of the lower bracket is alternately arranged with a plurality of third limiting grooves and fourth limiting grooves around its center, the bottom walls of the first limiting groove and the third limiting groove are both provided with a first through-hole passing therethrough, the bottom walls of the second limiting groove and the fourth limiting groove are both provided with a second through-hole passing therethrough, the first limiting groove and the fourth limiting groove are used for plugging the two ends of the same battery cell, the second limiting groove and the third limiting groove are used for plugging the two ends of the same battery cell, the first boss of the battery cell is passed through the first through-hole, the second boss of the battery cell is passed through the second through-hole, the depths of the first through-hole and the second through-hole are respectively adapted to the thicknesses of the first boss and the second boss, the inner end surface of the upper bracket is downwardly extended with a first connecting portion, the inner end surface of the lower bracket is upwardly extended with a second connecting portion, the first connecting portion and the second connecting portion are detachably combined and connected so that multiple battery cells can be installed between the upper bracket and the lower bracket.

[0009] Optionally, the radial size of the first boss is smaller than the radial size of the second boss, and the radial sizes of the first through hole and the second through hole are respectively adapted to the radial sizes of the first boss and the second boss; or,

[0010] The radial size of the first boss is larger than the radial size of the second boss, and the radial sizes of the first through hole and the second through hole are respectively adapted to the radial sizes of the first boss and the second boss.

[0011] Optionally, the first limiting groove, the second limiting groove, the third limiting groove and the fourth limiting groove are semi-open arc-shaped slots, and the arc angle thereof is greater than 240 degrees.

[0012] Optionally, the first connecting portion includes a plurality of latching protrusions arranged around the center of the upper bracket, and the second connecting portion includes a plurality of latching grooves arranged around the center of the lower bracket, and one of the latching protrusions is engaged with one of the latching grooves to fix the upper bracket and the lower bracket in connection.

[0013] Optionally, the battery cell unit also includes a plurality of the first connecting members, one second connecting member and one third connecting member, the two ends of the first connecting member are respectively electrically connected to the first boss and the second boss on the same side of two adjacent battery cells to connect the plurality of battery cells in series, and the first connecting member and the second connecting member are respectively electrically connected to the remaining first boss and second boss of two adjacent battery cells.

[0014] Optionally, the outer end surface of the upper bracket is provided with a first groove connected to the first limiting groove and the second limiting groove, and the outer end surface of the lower bracket is provided with a second groove connected to the third limiting groove and the fourth limiting groove, one of the first groove and the second groove is provided with a plurality of the first connecting members, one second connecting member and one third connecting member, and the other is provided with a plurality of the first connecting members.

[0015] In order to achieve the above-mentioned other object, the present invention discloses a battery module, which includes: a plurality of battery cell units as described above arranged in a vertical stack.

[0016] Optionally, the first connecting part includes a first connecting column arranged at the center of the upper bracket, the first connecting column is provided with a first connecting hole passing through the upper bracket, the second connecting part includes a second connecting column arranged at the center of the lower bracket, the second connecting column is provided with a second connecting hole passing through the lower bracket, and the screw is passed through the first connecting hole and the second connecting hole of the multiple battery cell units and is threadedly connected with a nut to fix the multiple battery cell units in connection.

[0017] The present invention is provided with an upper bracket and a lower bracket to fix the battery cell whose first boss arranged on the end face is thinner than the second boss, the upper bracket is alternately arranged with a plurality of first limiting grooves and a second limiting groove, the lower bracket is alternately arranged with a plurality of third limiting grooves and a fourth limiting groove, the bottom walls of the first limiting groove and the third limiting groove are both provided with a first through-hole penetrating therethrough, the bottom walls of the second limiting groove and the fourth limiting groove are both provided with a second through-hole penetrating therethrough, the two ends of the battery cell are plugged into the first limiting groove and the fourth limiting groove or plugged into the second limiting groove and the third limiting groove, the first boss of the battery cell is passed through the first through-hole, and the second boss of the battery cell is passed through the first through-hole The platform is passed through the second through hole, and the upper bracket and the lower bracket are provided with a first connecting part and a second connecting part. The first connecting part and the second connecting part are detachably combined and connected so that multiple battery cells can be installed between the upper bracket and the lower bracket. The depths of the first through hole and the second through hole are respectively adapted to the thicknesses of the first boss and the second boss to form an effect that the depth of the first through hole in the upper bracket and the lower bracket is less than the depth of the second through hole, thereby enabling the upper bracket and the lower bracket to match the battery cell whose thickness of the first boss is less than that of the second boss, effectively realizing the rapid and efficient assembly of such battery cells into groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of a battery cell unit according to an embodiment of the present invention.

[0019] Figure 2 This is an exploded structural diagram of a battery cell unit according to an embodiment of the present invention.

[0020] Figure 3 for Figure 2 Three-dimensional structure diagram from another angle.

[0021] Figure 4 This is a bottom view of the upper bracket in the battery cell unit according to an embodiment of the present invention.

[0022] Figure 5 It is a three-dimensional structural diagram of a battery module according to an embodiment of the present invention.

[0023] Figure 6 This is an exploded structural diagram of a battery module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0025] See also Figures 1 to 6 The present invention discloses a battery cell unit 100, which includes:

[0026] A plurality of battery cells 1, each having a first boss 11 and a second boss 12 on both end surfaces thereof, wherein the thickness of the first boss 11 is smaller than that of the second boss 12;

[0027] The upper bracket 21 and the lower bracket 22, the inner end surface of the upper bracket 21 is alternately arranged with a plurality of first limiting grooves 211 and second limiting grooves 212 around its center, the inner end surface of the lower bracket 22 is alternately arranged with a plurality of third limiting grooves 221 and fourth limiting grooves 222 around its center, the bottom walls of the first limiting grooves 211 and the third limiting grooves 221 are both provided with a first through hole 23 passing through, the bottom walls of the second limiting grooves 212 and the fourth limiting grooves 222 are both provided with a second through hole 24 passing through, the first limiting grooves 211 and the fourth limiting grooves 222 are used for plugging the two ends of the same battery cell 1, the second limiting grooves 212 and the third limiting grooves 222 are both provided with a second through hole 24 passing through, The limiting groove 221 is used for the two ends of the same battery cell 1 to be plugged in. The first boss 11 of the battery cell 1 is passed through the first through hole 23, and the second boss 12 of the battery cell 1 is passed through the second through hole 24. The depths of the first through hole 23 and the second through hole 24 are respectively adapted to the thicknesses of the first boss 11 and the second boss 12. A first connecting portion 213 is extended downward from the inner end surface of the upper bracket 21, and a second connecting portion 223 is extended upward from the inner end surface of the lower bracket 22. The first connecting portion 213 and the second connecting portion 223 are detachably combined and connected so that multiple battery cells 1 can be installed between the upper bracket 21 and the lower bracket 22.

[0028] The present invention is provided with an upper bracket 21 and a lower bracket 22 to fix the battery cell 1 whose thickness of the first boss 11 set on the end face is less than that of the second boss 12, the upper bracket 21 is alternately arranged with a plurality of first limiting grooves 211 and second limiting grooves 212, the lower bracket 22 is alternately arranged with a plurality of third limiting grooves 221 and fourth limiting grooves 222, the bottom walls of the first limiting grooves 211 and the third limiting grooves 221 are both provided with a first through hole 23 passing through, the bottom walls of the second limiting grooves 212 and the fourth limiting grooves 222 are both provided with a second through hole 24 passing through, the two ends of the battery cell 1 are plugged into the first limiting grooves 211 and the fourth limiting grooves 222 or plugged into the second limiting grooves 212 and the third limiting grooves 221, the first boss 11 of the battery cell 1 is passed through the first through hole 23, the battery cell The second boss 12 of 1 is passed through the second through hole 24, and the upper bracket 21 and the lower bracket 22 are provided with a first connecting portion 213 and a second connecting portion 223. The first connecting portion 213 and the second connecting portion 223 are detachably combined and connected so that multiple battery cells 1 can be installed between the upper bracket 21 and the lower bracket 22. The depths of the first through hole 23 and the second through hole 24 are respectively adapted to the thicknesses of the first boss 11 and the second boss 12, so as to form an effect in which the depth of the first through hole 23 in the upper bracket 21 and the lower bracket 22 is less than the depth of the second through hole 24, thereby enabling the upper bracket 21 and the lower bracket 22 to match the battery cell 1 in which the thickness of the first boss 11 is less than the thickness of the second boss 12, thereby effectively realizing the rapid and efficient assembly of such battery cells 1 into groups.

[0029] Specifically, in this embodiment, the battery cell 1 is a sulfur dioxide battery cell, the first boss 11 is a positive boss, and the second boss 12 is a negative boss, but not limited to this. In some embodiments, the first boss 11 of the battery cell 1 is a negative boss, and the second boss 12 is a positive boss.

[0030] See Figures 1 to 6 In this embodiment, the radial dimension of the first boss 11 is smaller than the radial dimension of the second boss 12, and the radial dimensions of the first through hole 23 and the second through hole 24 are respectively adapted to the radial dimensions of the first boss 11 and the second boss 12, but is not limited thereto. In some embodiments, the radial dimension of the first boss 11 is larger than the radial dimension of the second boss 12, and the radial dimensions of the first through hole 23 and the second through hole 24 are respectively adapted to the radial dimensions of the first boss 11 and the second boss 12.

[0031] Specifically, in this embodiment, the radial size and thickness of the positive electrode boss of the sulfur dioxide battery cell are smaller than the radial size and thickness of the negative electrode boss, and the radial size and depth of the first through hole 23 and the second through hole 24 are respectively adapted to the radial size and thickness of the first boss 11 and the second boss 12. Therefore, the radial size and depth of the first through hole 23 are smaller than the radial size and depth of the second through hole 24, so that the upper bracket 21 and the lower bracket 22 can be matched and installed with the battery cell 1 in which the thickness and radial size of the first boss 11 are smaller than the thickness and radial size of the second boss 12, so that the battery cells 1 can be assembled into groups quickly and efficiently.

[0032] See Figures 1 to 6 The first limiting groove 211, the second limiting groove 212, the third limiting groove 221 and the fourth limiting groove 222 are semi-open arc-shaped slots, and the curvature thereof is greater than 240 degrees.

[0033] Specifically, in this embodiment, the cross-section of the main body of the upper bracket 21 and the lower bracket 22 is hexagonal and the sharp corners are set to arc shape, and there are 6 battery cells 1 arranged corresponding to the positions of the sharp corners to meet the requirement that the outer dimensions of the upper bracket 21 and the lower bracket 22 are ≤ the outer dimensions of the combined battery cells 1, and the first limiting groove 211, the second limiting groove 212, the third limiting groove 221 and the fourth limiting groove 222 that wrap the battery cells 1 are formed on the inner end surfaces of the upper bracket 21 and the lower bracket 22 corresponding to the positions of the battery cells 1. Since the curvature of each limiting groove that wraps the battery cells 1 is greater than 240 degrees, rather than only greater than 180 degrees, it can effectively prevent the battery cells 1 from falling, but is not limited to this.

[0034] See Figures 1 to 6 The first connecting portion 213 includes a plurality of latching protrusions 214 arranged around the center of the upper bracket 21, and the second connecting portion 223 includes a plurality of latching grooves 224 arranged around the center of the lower bracket 22. One latching protrusion 214 is correspondingly engaged with one latching groove 224 to fix the upper bracket 21 and the lower bracket 22 in connection, and to achieve the effect of detachable separation of the upper bracket 21 and the lower bracket 22.

[0035] Specifically, in this embodiment, three latching protrusions 214 are provided, and two adjacent latching protrusions 214 are arranged on the upper bracket 21 at intervals of 120 degrees, and the latching groove 224 is arranged on the lower bracket 22 in the same manner as the latching protrusion 214, but is not limited to this. The upper bracket 21 may also be provided with a latching groove 224 and a latching protrusion 214.

[0036] See Figures 1 to 6The battery cell 1 unit also includes multiple first connectors 31, a second connector 32 and a third connector 33. The two ends of the first connector 31 are respectively electrically connected to the first boss 11 and the second boss 12 on the same side of the two adjacent battery cells 1 to connect the multiple battery cells 1 in series. The first connector 31 and the second connector 32 are respectively electrically connected to the remaining first boss 11 and the second boss 12 of the two adjacent battery cells 1.

[0037] Furthermore, the outer end surface of the upper bracket 21 is provided with a first groove 215 connected with the first limiting groove 211 and the second limiting groove 212, and the outer end surface of the lower bracket 22 is provided with a second groove 225 connected with the third limiting groove 221 and the fourth limiting groove 222. One of the first groove 215 and the second groove 225 is provided with multiple first connecting members 31, a second connecting member 32 and a third connecting member 33, and the other is provided with multiple first connecting members 31.

[0038] Specifically, in this embodiment, the first groove 215 of the upper bracket 21 is provided with multiple first connecting members 31, one second connecting member 32 and one third connecting member 33, and the second groove 225 of the lower bracket 22 is provided with multiple first connecting members 31, but is not limited to this. In some embodiments, the first groove 215 of the upper bracket 21 is provided with multiple first connecting members 31, and the second groove 225 of the lower bracket 22 is provided with multiple first connecting members 31, one second connecting member 32 and one third connecting member 33.

[0039] See also Figures 1 to 6 The present invention discloses a battery module 200, which includes: a plurality of battery cell units 100 as described above arranged in a vertical stack.

[0040] Specifically, in this embodiment, the battery module includes a first battery cell unit 101 and a second battery cell unit 102 arranged in a vertical stack, and a series connection member 201, a positive electrode connecting line 202, and a negative electrode connecting line 203 are provided to connect the first battery cell unit 101 and the second battery cell unit 102 in series. A plurality of first connecting members 31, a second connecting member 32, and a third connecting member 33 of the first battery cell unit 101 are provided in the first groove 215 of the upper bracket 21, and a plurality of first connecting members 31 are provided in the second groove 225 of the lower bracket 22 to connect the battery cells 1 of the first battery cell unit 101 in series. A plurality of first connecting members 31, a second connecting member 32, and a third connecting member 33 of the first battery cell unit 101 are provided in the second groove 225 of the lower bracket 22, and a plurality of first connecting members 31 are provided in the first groove 215 of the upper bracket 21 to connect the battery cells 1 of the second battery cell unit 102 in series.

[0041] The positive electrode connecting line 202 is connected to the second connecting piece 32 of the upper bracket 21 of the first battery cell unit 101, one end of the series connection piece 201 is connected to the third connecting piece 33 of the upper bracket 21 of the first battery cell unit 101, and the other end is connected to the second connecting piece 32 of the lower bracket 22 of the second battery cell unit 102, and the negative electrode connecting line 203 is connected to the third connecting piece 33 of the lower bracket 22 of the second battery cell unit 102, thereby realizing the series connection of the first battery cell unit 101 and the second battery cell unit 102, but not limited to this.

[0042] See Figures 1 to 6 The first connecting part 213 includes a first connecting column 216 arranged at the center of the upper bracket 21, and the first connecting column 216 is provided with a first connecting hole 217 passing through the upper bracket 21. The second connecting part 223 includes a second connecting column 226 arranged at the center of the lower bracket 22, and the second connecting column 226 is provided with a second connecting hole 227 passing through the lower bracket 22. The screw 204 is passed through the first connecting hole 217 and the second connecting hole 227 of the multiple battery cell units 100 and is threadedly connected with the nut 205 to fix the multiple battery cell units 100.

[0043] Specifically, in this embodiment, the screw 204 is sequentially passed through the first connection hole 217 and the second connection hole 227 of the first battery cell unit 101 and the first connection hole 217 and the second connection hole 227 of the second battery cell unit 102, and then threadedly connected to the nut 205 to fix the first battery cell unit 101 and the second battery cell unit 102, and there is an insulating sheet 206 between the first battery cell unit 101 and the second battery cell unit 102, but is not limited to this.

[0044] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope of the present invention.

Claims

1. A battery cell unit, characterized in that: include: A plurality of battery cells, each having a first boss and a second boss provided on both end surfaces thereof, wherein the thickness of the first boss is smaller than the thickness of the second boss; An upper bracket and a lower bracket, the inner end surface of the upper bracket is alternately arranged with a plurality of first limiting grooves and second limiting grooves around its center, the inner end surface of the lower bracket is alternately arranged with a plurality of third limiting grooves and fourth limiting grooves around its center, the bottom walls of the first limiting groove and the third limiting groove are both provided with a first through-hole passing therethrough, the bottom walls of the second limiting groove and the fourth limiting groove are both provided with a second through-hole passing therethrough, the first limiting groove and the fourth limiting groove are used for plugging the two ends of the same battery cell, the second limiting groove and the third limiting groove are used for plugging the two ends of the same battery cell, the first boss of the battery cell is passed through the first through-hole, the second boss of the battery cell is passed through the second through-hole, the depths of the first through-hole and the second through-hole are respectively adapted to the thicknesses of the first boss and the second boss, the inner end surface of the upper bracket is downwardly extended with a first connecting portion, the inner end surface of the lower bracket is upwardly extended with a second connecting portion, the first connecting portion and the second connecting portion are detachably combined and connected so that multiple battery cells can be installed between the upper bracket and the lower bracket.

2. The battery cell unit according to claim 1, characterized in that The radial size of the first boss is smaller than the radial size of the second boss, and the radial sizes of the first through hole and the second through hole are respectively adapted to the radial sizes of the first boss and the second boss; or, The radial size of the first boss is larger than the radial size of the second boss, and the radial sizes of the first through hole and the second through hole are respectively adapted to the radial sizes of the first boss and the second boss.

3. The battery cell unit according to claim 1, characterized in that The first limiting groove, the second limiting groove, the third limiting groove and the fourth limiting groove are semi-open arc-shaped slots, and the arc angle thereof is greater than 240 degrees.

4. The battery cell unit according to claim 1, characterized in that The first connecting portion includes a plurality of latching protrusions arranged around the center of the upper bracket, and the second connecting portion includes a plurality of latching grooves arranged around the center of the lower bracket. One of the latching protrusions is correspondingly engaged with one of the latching grooves to fix the upper bracket and the lower bracket in connection.

5. The battery cell unit according to claim 1, characterized in that: It also includes multiple first connecting members, one second connecting member and one third connecting member, the two ends of the first connecting member are respectively electrically connected to the first boss and the second boss on the same side of two adjacent battery cells to connect the multiple battery cells in series, and the first connecting member and the second connecting member are respectively electrically connected to the remaining first boss and second boss of two adjacent battery cells.

6. The battery cell unit according to claim 5, characterized in that: The outer end surface of the upper bracket is provided with a first groove connected with the first limiting groove and the second limiting groove, and the outer end surface of the lower bracket is provided with a second groove connected with the third limiting groove and the fourth limiting groove. One of the first groove and the second groove is provided with multiple first connecting members, one second connecting member and one third connecting member, and the other is provided with multiple first connecting members.

7. A battery module, characterized in that: include: A plurality of battery cell units according to any one of claims 1 to 6 arranged in a vertical stack.

8. The battery cell unit according to claim 7, characterized in that: The first connecting part includes a first connecting column arranged at the center of the upper bracket, and the first connecting column is provided with a first connecting hole passing through the upper bracket. The second connecting part includes a second connecting column arranged at the center of the lower bracket, and the second connecting column is provided with a second connecting hole passing through the lower bracket. The screw is passed through the first connecting hole and the second connecting hole of the multiple battery cell units and is threadedly connected with a nut to fix the multiple battery cell units.

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