Cylindrical battery module structure capable of being simply assembled

Abstract

The utility model discloses a cylindrical battery module structure capable of being simply assembled, which belongs to the technical field of batteries and comprises two battery cell brackets with opposite mounting directions, the battery cell group is fixed between the two battery cell brackets, and a plurality of battery cells of the battery cell group have the same polarity and are used for storing energy and supplying power; the acquisition and connection assembly is arranged on one side of the battery cell group and is used for acquiring performance data of each battery cell, measuring the working temperature of the battery cells and connecting the battery cells in series and in parallel; and the epoxy fiber board with the gum and the protection board are sequentially arranged above the battery cell bracket and are fixed through screws. According to the utility model, the connection assembly is used for replacing the original connection A, connection B and temperature sensing line, so that the overall material quantity of the battery module can be reduced, and the storage and assembly difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a cylindrical battery module structure that can be easily assembled. Background Art

[0002] With the development of the new energy industry and the vigorous promotion of clean energy, the transition from fuel vehicles to electric vehicles has become the mainstream development trend today. Due to the diverse chassis structures of automobiles, in order to optimize the spatial layout of the battery pack system, improve the energy density of the entire vehicle and reduce manufacturing costs, various automotive industries have also put forward many requirements for the structural shape development of the modules within the battery pack system.

[0003] However, the existing battery module structure has the following problems:

[0004] 1. The battery cells are connected in series and parallel and need to be installed in strict accordance with the positive and negative polarity directions. If a battery cell is installed in reverse, it may cause combustion, explosion and other safety accidents.

[0005] 2. Since the positive and negative poles of the battery modules are distributed left and right in series and parallel, both sides need to be connected with connecting pieces, which makes the production process cumbersome and complicated;

[0006] 3. There are many connecting pieces and the production cost is high;

[0007] 4. Each connecting piece is large, not compact and expensive;

[0008] 5. The collection points on the protection plate are distributed on both sides, and the arrangement is complex, which increases the difficulty of design and production;

[0009] 6. The temperature sensing wire is often loosened from the battery cell surface, resulting in inaccurate data collection, misjudging the protection board and causing unnecessary abnormalities;

[0010] 7. During operation, the temperature sensing wire moves with the battery module, which may cause stress and the risk of wear, cutting or breaking.

[0011] 8. The price of water drop type temperature sensing cable is expensive, about 0.6 yuan per PCS. Utility Model Content

[0012] In order to solve the above problems, the present invention adopts the following technical solutions:

[0013] A cylindrical battery module structure that can be easily assembled includes:

[0014] Two battery cell holders, the two battery cell holders being installed in opposite directions;

[0015] A battery cell group arranged in a matrix, the battery cell group being fixed between two of the battery cell supports, and the multiple battery cells in the battery cell group having the same polarity, for energy storage and power supply;

[0016] A data acquisition and connection component is provided on one side of the battery cell group and is used to collect performance data of each battery cell, measure the operating temperature of the battery cell, and connect the battery cells in series and parallel;

[0017] The adhesive-backed epoxy fiberboard and the protective plate are sequentially installed on top of the battery holder and fixed by screws.

[0018] Furthermore, the two battery cell brackets are fixed by means of a fixing screw and a fixing nut.

[0019] Furthermore, a plurality of connecting posts are spaced apart above the battery cell support, and a plurality of through holes matching the plurality of connecting posts are provided on the epoxy fiberboard with adhesive backing.

[0020] Furthermore, the collection and connection assembly includes a connecting piece A, multiple connecting pieces D and a connecting piece C arranged in sequence, and the connecting piece A, the connecting piece D and the connecting piece C are all welded on the corresponding battery cell poles for connecting the battery cells in series and parallel. The connecting piece A, the connecting piece D, the connecting piece C and the temperature sensing line are integrated into the insulating fixing piece, and a plurality of protection plate welding points are provided on the side of the protection plate away from the epoxy fiberboard with adhesive backing. The lead-out part of the connecting piece D, the lead-out part of the connecting piece A and the lead-out part of the connecting piece C are all battery cell voltage collection points, wherein the lead-out part of the connecting piece D is welded to the corresponding welding point of the protection plate, a first battery cell temperature sensing collection point is provided on the connecting piece A, a second battery cell temperature collection point is provided on the connecting piece D in the middle position, and a third battery cell temperature collection point is provided on the connecting piece C.

[0021] Furthermore, the positive electrodes of the battery cells in the first column are connected through the connecting piece A, the negative electrodes of the battery cells in the last column are connected through the connecting piece C, and the battery cells in two adjacent columns are connected through the connecting piece D, wherein the first end of the connecting piece D is connected to the negative electrode of the battery cells in the previous column, and the second end is connected to the positive electrode of the battery cells in this column.

[0022] Furthermore, the connecting piece A includes:

[0023] Connecting piece A body;

[0024] A plurality of first protrusions, wherein the plurality of first protrusions are located in parallel on one side of the connecting piece A body, and the first protrusions are lead-out portions of the connecting piece A;

[0025] a plurality of second protrusions, the plurality of second protrusions being arranged in parallel on a side of the connecting piece A body away from the first protrusion, the plurality of second protrusions being arranged in one-to-one correspondence with the battery cells in the first column, and being respectively connected to the positive electrodes of the battery cells;

[0026] The connecting piece A body, the plurality of first protrusions and the plurality of second protrusions are an integrated structure.

[0027] Furthermore, the connecting piece D includes:

[0028] Connecting piece D body;

[0029] A plurality of first arc-shaped protrusions, the plurality of first arc-shaped protrusions being arranged in parallel on one side of the connecting piece D body, the plurality of first arc-shaped protrusions being arranged in one-to-one correspondence with the plurality of battery cells in the previous row, and being respectively connected to the negative electrodes of the battery cells in the previous row;

[0030] A plurality of third protrusions, the plurality of third protrusions are located in parallel on a side of the connecting piece D body away from the first arc-shaped protrusion, the plurality of third protrusions are arranged in a one-to-one correspondence with the battery cells in this column, and are respectively connected to the positive electrodes of the battery cells in this column, the lead portion is provided on the third protrusion on the side close to the protective plate, the lead portion is respectively welded to the corresponding welding point on the protective plate, and the third protrusion is the lead portion of the connecting piece D;

[0031] The connecting piece D body, the first arc-shaped protrusions and the third protrusions are an integrated structure.

[0032] Furthermore, the connecting piece C includes:

[0033] Connecting piece C body;

[0034] A plurality of second arc-shaped protrusions, the plurality of second arc-shaped protrusions are arranged in parallel on one side of the connecting piece C body, the plurality of second arc-shaped protrusions are arranged in a one-to-one correspondence with the battery cells in the last column, and are respectively connected to the negative electrodes of the battery cells in the last column;

[0035] a plurality of fourth protrusions, the plurality of fourth protrusions being located in parallel on a side of the connecting piece C body away from the second arc-shaped protrusion, the fourth protrusions being the lead-out portion of the connecting piece C;

[0036] The connecting piece C body, the plurality of the second arc-shaped protrusions and the plurality of the fourth protrusions are an integrated structure.

[0037] Furthermore, one of the two battery cell brackets is provided with a male buckle, and the other is provided with a matching female buckle.

[0038] Beneficial effects of the utility model:

[0039] The utility model does not need to distinguish between positive and negative directions when assembling battery cells, so that the polarity of the battery cells is on the same side, which reduces the difficulty of the production process and avoids safety hazards such as combustion and explosion caused by short circuit caused by reverse installation of battery cells.

[0040] The utility model realizes the series-parallel connection of the battery cells on the same side, reduces the number of installed connecting pieces, and reduces the production cost.

[0041] The utility model can realize series and parallel connection of battery cells on the connecting pieces of the same area on the original basis, thereby reducing the manufacturing cost of the connecting pieces.

[0042] The utility model can reduce the number of connecting pieces by half, thereby reducing material costs.

[0043] The collection connection component of the utility model replaces the original connection A, connection B and temperature sensing line, has a simple assembly process, saves labor and improves efficiency.

[0044] The collection connection assembly of the utility model replaces the original connection A, connection B and temperature sensing line, which can reduce the overall material quantity of the battery module and reduce the difficulty of warehousing and assembly.

[0045] The overall appearance of this utility model is neater and safer. The original teardrop-shaped temperature sensor is expensive, the collection accuracy is not high and often causes misjudgment due to poor contact, and there is also a risk of short circuit due to wire harness skin abrasion. The price of the patch-type temperature sensor is distributed at 0.05 yuan, and the temperature of the battery cell welded on the collection connection component is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is an exploded schematic diagram of the existing structure in the background art;

[0047] Figure 2 This is an exploded schematic diagram of a cylindrical battery module structure that can be easily assembled according to the present invention;

[0048] Figure 3 This is a side view of a cylindrical battery module structure that can be easily assembled according to the present invention;

[0049] Figure 4 This is a schematic diagram of a connecting piece A of a cylindrical battery module structure that can be easily assembled according to the present invention;

[0050] Figure 5 This is a schematic diagram of a connecting piece D of a cylindrical battery module structure that can be easily assembled according to the present invention;

[0051] Figure 6 This is a schematic diagram of a connecting piece C of a cylindrical battery module structure that can be easily assembled according to the present invention.

[0052] In the figure: 1. Battery cell; 2. Battery cell bracket; 3. Epoxy fiberboard with adhesive backing; 4. Protective plate; 5. Connecting piece A; 6. Connecting piece D; 7. Connecting piece C; 8. Fixing screw; 9. Fixing nut; 10. Insulating fixing piece. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] Example 1

[0055] refer to Figures 1 to 6 , a cylindrical battery module structure that can be easily assembled, comprising:

[0056] Two battery cell holders 2, the two battery cell holders 2 are installed in opposite directions;

[0057] A battery cell group arranged in a matrix, the battery cell group is fixed between two battery cell brackets 2, and the multiple battery cells 1 of the battery cell group have the same polarity and are used for energy storage and power supply;

[0058] The acquisition connection component is provided on one side of the battery cell group and is used to collect performance data of each battery cell 1, measure the operating temperature of the battery cell 1 and connect the battery cells 1 in series and parallel;

[0059] The adhesive-backed epoxy fiberboard 3 and the protective plate 4 are sequentially installed on the top of the battery holder 2 and fixed with screws.

[0060] The utility model uses an insulating fixing plate to integrate the connecting plate A, connecting plate D, connecting plate C and the temperature sensing line into one part through a welding process, and also has the functions of collecting the performance data of each battery cell, measuring the operating temperature of the battery cell, and connecting the battery cells in series and parallel.

[0061] The utility model does not need to distinguish between positive and negative directions when assembling battery cells, so that the polarity of the battery cells is on the same side, which reduces the difficulty of the production process and avoids safety hazards such as combustion and explosion caused by short circuit caused by reverse installation of battery cells.

[0062] The utility model realizes the series-parallel connection of the battery cells on the same side, reduces the number of installed connecting pieces, and reduces the production cost.

[0063] The utility model can realize series and parallel connection of battery cells on the connecting pieces of the same area on the original basis, thereby reducing the manufacturing cost of the connecting pieces.

[0064] The utility model can reduce the number of connecting pieces by half, thereby reducing material costs.

[0065] In this embodiment, adhesive-backed epoxy fiberboard is used for insulation and protection of the protective board;

[0066] In this embodiment, the battery cell holder is used to fix the battery cell;

[0067] In this embodiment, the screw and nut are used to fix the battery cell holder;

[0068] In this embodiment, the battery cell is used for energy storage and power supply (power supply);

[0069] In this embodiment, self-tapping screws are used to fix the protection plate;

[0070] In this embodiment, the protection board is used to protect and control the charging and discharging of the battery cell;

[0071] In this embodiment, the acquisition connection component is used to collect performance data of each battery cell, measure the operating temperature of the battery cell, and connect the battery cells in series and parallel.

[0072] In this embodiment, the two battery cell supports 2 are fixed by means of a fixing screw 8 and a fixing nut 9 .

[0073] In this embodiment, a plurality of connecting posts are spaced apart above the battery cell support 2 , and a plurality of through holes matching the plurality of connecting posts are provided on the adhesive-backed epoxy fiberboard 3 .

[0074] In this embodiment, the collection and connection assembly includes a connecting piece A5, multiple connecting pieces D6 and a connecting piece C7 arranged in sequence. The connecting piece A5, the connecting piece D6 and the connecting piece C7 are all welded to the corresponding battery cell 1 poles for connecting the battery cells 1 in series and in parallel. The connecting piece A5, the connecting piece D6, the connecting piece C7 and the temperature sensing line are integrated into the insulating fixing piece 10. A plurality of protective plate 4 welding points are provided on the side of the protective plate 4 away from the epoxy fiberboard 3 with adhesive backing. The lead-out part of the connecting piece D6, the lead-out part of the connecting piece A5 and the lead-out part of the connecting piece C7 are all battery cell 1 voltage collection points, wherein the lead-out part of the connecting piece D6 is welded to the corresponding welding point of the protective plate 4. A first battery cell 1 temperature sensing collection point is provided on the connecting piece A5, a second battery cell 1 temperature collection point is provided on the connecting piece D6 in the middle position, and a third battery cell 1 temperature collection point is provided on the connecting piece C7.

[0075] Among them, the lead-out end of connecting piece A is the B-cell voltage collection point, the lead-out ends of connecting piece D are the B1 cell voltage collection point, B2 cell voltage collection point, B3 cell voltage collection point, B4 cell voltage collection point, B5 cell voltage collection point, B6 cell voltage collection point, B7 cell voltage collection point, B8 cell voltage collection point, B9 cell voltage collection point, B10 cell voltage collection point, B11 cell voltage collection point, and B12 cell voltage collection point, the lead-out end of connecting piece C is the B+ cell voltage collection point, T1 is the cell temperature collection point of connecting piece A, T2 is the cell temperature collection point of connecting piece D, and T3 is the cell temperature collection point of connecting piece C.

[0076] In this embodiment, the positive electrodes of the first column of battery cells 1 are connected through the connecting piece A5, the negative electrodes of the last column of battery cells 1 are connected through the connecting piece C7, and the two adjacent columns of battery cells 1 are connected through the connecting piece D6, wherein the first end of the connecting piece D6 is connected to the negative electrode of the battery cells 1 in the previous column, and the second end is connected to the positive electrode of the battery cells 1 in the current column.

[0077] In this embodiment, the connecting piece A5 realizes the parallel connection of the first column of battery cells 1, the connecting piece C7 realizes the parallel connection of the last column of battery cells 1, the connecting piece D6 realizes the parallel connection of the battery cells 1 in the current column, and the battery cells 1 in two adjacent columns are connected in series.

[0078] In this embodiment, the connecting piece A5 includes:

[0079] Connecting piece A5 body;

[0080] A plurality of first protrusions, which are arranged in parallel on one side of the connecting piece A5 body, and the first protrusions are the lead-out parts of the connecting piece A5;

[0081] A plurality of second protrusions are arranged in parallel on a side of the connecting piece A5 body away from the first protrusion. The plurality of second protrusions are arranged in a one-to-one correspondence with the battery cells 1 in the first column and are respectively connected to the positive electrodes of the battery cells 1;

[0082] The connecting piece A5 body, the plurality of first protrusions and the plurality of second protrusions are an integrated structure.

[0083] In this embodiment, the connecting piece D6 includes:

[0084] Connecting piece D6 body;

[0085] A plurality of first arc-shaped protrusions, the plurality of first arc-shaped protrusions are arranged in parallel on one side of the connecting piece D6 body, the plurality of first arc-shaped protrusions are arranged in a one-to-one correspondence with the plurality of battery cells 1 in the previous row, and are respectively connected to the negative electrodes of the battery cells 1 in the previous row;

[0086] Multiple third protrusions are located in parallel on the side of the connecting piece D6 body away from the first arc-shaped protrusion. The multiple third protrusions are arranged in a one-to-one correspondence with the battery cells 1 in this column and are respectively connected to the positive electrodes of the battery cells 1 in this column. The lead-out portions are arranged on the third protrusions on the side close to the protective plate 4. The lead-out portions are respectively welded to the corresponding welding points on the protective plate 4. The third protrusions are the lead-out portions of the connecting piece D6;

[0087] The connecting piece D6 body, the plurality of first arc-shaped protrusions and the plurality of third protrusions are an integrated structure.

[0088] In this embodiment, the connecting piece C7 includes:

[0089] Connecting piece C7 body;

[0090] Multiple second arc-shaped protrusions are arranged in parallel on one side of the connecting piece C7 body. The multiple second arc-shaped protrusions are arranged in a one-to-one correspondence with the battery cells 1 in the last column and are respectively connected to the negative electrodes of the battery cells 1 in the last column;

[0091] A plurality of fourth protrusions are arranged in parallel on a side of the connecting piece C7 body away from the second arc-shaped protrusion, and the fourth protrusions are the lead-out portions of the connecting piece C7;

[0092] The connecting piece C7 body, the plurality of second arc-shaped protrusions and the plurality of fourth protrusions are an integrated structure.

[0093] In this embodiment, one of the two battery cell holders 2 is provided with a male buckle, and the other is provided with a matching female buckle.

[0094] Example 2

[0095] This embodiment is the assembly process in Example 1, and its steps include:

[0096] 1. Install the battery cells with the same polarity into one of the battery holders;

[0097] 2. Install the other battery holder in the opposite direction to ensure that the battery is fixed between the two battery holders and that the male and female buckles of the two battery holders match each other;

[0098] 3. Use fixing screws and fixing nuts to fix the two battery cell brackets together to ensure firmness and strength;

[0099] 4. Use the collection connection components to connect the positive and negative poles of the battery cell according to the series and parallel relationship of the battery cell mold, and fix them by welding;

[0100] 5. Use the positioning column on the top of the battery holder to install the epoxy fiberboard with adhesive backing, install the protection plate according to the direction, and fix it to the battery holder with screws;

[0101] 6. Bend the lead parts on the connecting piece 90° and solder them to the pads on the protection board.

[0102] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A cylindrical battery module structure that can be easily assembled, characterized in that: include: Two battery cell holders, the two battery cell holders being installed in opposite directions; A battery cell group arranged in a matrix, the battery cell group being fixed between two of the battery cell supports, and the multiple battery cells in the battery cell group having the same polarity, for energy storage and power supply; A data acquisition and connection component is provided on one side of the battery cell group and is used to collect performance data of each battery cell, measure the operating temperature of the battery cell, and connect the battery cells in series and parallel; The adhesive-backed epoxy fiberboard and the protective plate are sequentially installed on top of the battery holder and fixed by screws.

2. The cylindrical battery module structure that can be easily assembled according to claim 1, characterized in that: The two battery cell supports are fixed by means of a fixing screw and a fixing nut.

3. The cylindrical battery module structure that can be easily assembled according to claim 2, characterized in that: A plurality of connecting columns are arranged at intervals above the battery support, and a plurality of through holes matching the plurality of connecting columns are arranged on the epoxy fiberboard with adhesive backing.

4. The cylindrical battery module structure that can be easily assembled according to claim 1, characterized in that: The acquisition connection component includes a connecting piece A, multiple connecting pieces D and a connecting piece C arranged in sequence. The connecting piece A, the connecting piece D and the connecting piece C are all welded on the corresponding battery cell poles for connecting the battery cells in series and parallel. The connecting piece A, the connecting piece D, the connecting piece C and the temperature sensing line are integrated into the insulating fixing piece. A plurality of protection plate welding points are provided on the side of the protection plate away from the epoxy fiberboard with adhesive backing. The lead-out part of the connecting piece D, the lead-out part of the connecting piece A and the lead-out part of the connecting piece C are all battery cell voltage acquisition points, wherein the lead-out part of the connecting piece D is welded to the corresponding welding point of the protection plate, a first battery cell temperature sensing acquisition point is provided on the connecting piece A, a second battery cell temperature acquisition point is provided on the connecting piece D in the middle position, and a third battery cell temperature acquisition point is provided on the connecting piece C.

5. The cylindrical battery module structure that can be easily assembled according to claim 4, characterized in that: The positive electrodes of the battery cells in the first column are connected through the connecting piece A, the negative electrodes of the battery cells in the last column are connected through the connecting piece C, and the battery cells in two adjacent columns are connected through the connecting piece D, wherein the first end of the connecting piece D is connected to the negative electrode of the battery cell in the previous column, and the second end is connected to the positive electrode of the battery cell in this column.

6. The cylindrical battery module structure that can be easily assembled according to claim 5, characterized in that: The connecting piece A comprises: Connecting piece A body; A plurality of first protrusions, wherein the plurality of first protrusions are located in parallel on one side of the connecting piece A body, and the first protrusions are lead-out portions of the connecting piece A; a plurality of second protrusions, the plurality of second protrusions being arranged in parallel on a side of the connecting piece A body away from the first protrusion, the plurality of second protrusions being arranged in one-to-one correspondence with the battery cells in the first column, and being respectively connected to the positive electrodes of the battery cells; The connecting piece A body, the plurality of first protrusions and the plurality of second protrusions are an integrated structure.

7. The cylindrical battery module structure that can be easily assembled according to claim 5, characterized in that: The connecting piece D includes: Connecting piece D body; A plurality of first arc-shaped protrusions, the plurality of first arc-shaped protrusions being arranged in parallel on one side of the connecting piece D body, the plurality of first arc-shaped protrusions being arranged in one-to-one correspondence with the plurality of battery cells in the previous row, and being respectively connected to the negative electrodes of the battery cells in the previous row; A plurality of third protrusions, the plurality of third protrusions are located in parallel on a side of the connecting piece D body away from the first arc-shaped protrusion, the plurality of third protrusions are arranged in a one-to-one correspondence with the battery cells in this column, and are respectively connected to the positive electrodes of the battery cells in this column, the lead portion is provided on the third protrusion on the side close to the protective plate, the lead portion is respectively welded to the corresponding welding point on the protective plate, and the third protrusion is the lead portion of the connecting piece D; The connecting piece D body, the first arc-shaped protrusions and the third protrusions are an integrated structure.

8. The cylindrical battery module structure that can be easily assembled according to claim 5, characterized in that: The connecting piece C includes: Connecting piece C body; A plurality of second arc-shaped protrusions, the plurality of second arc-shaped protrusions are arranged in parallel on one side of the connecting piece C body, the plurality of second arc-shaped protrusions are arranged in a one-to-one correspondence with the battery cells in the last column, and are respectively connected to the negative electrodes of the battery cells in the last column; a plurality of fourth protrusions, the plurality of fourth protrusions being located in parallel on a side of the connecting piece C body away from the second arc-shaped protrusion, the fourth protrusions being the lead-out portion of the connecting piece C; The connecting piece C body, the plurality of the second arc-shaped protrusions and the plurality of the fourth protrusions are an integrated structure.

9. The cylindrical battery module structure that can be easily assembled according to claim 1, characterized in that: One of the two battery cell supports is provided with a male buckle, and the other is provided with a matching female buckle.

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