Novel single cell structure

Abstract

The utility model relates to the technical field of batteries, in particular to a novel single battery cell structure which comprises a battery cell, clamping plates are respectively arranged on two sides of the battery cell, the length of each clamping plate is matched with the length of the battery cell, the width of each clamping plate is matched with the width of the battery cell, and the two clamping plates clamp the battery cell and are fixedly connected with the battery cell through fixing pieces. At least one lightening hole is formed in each clamping plate, a positioning hole is formed in each battery cell, the axis of the positioning hole and the axis of the lightening hole are located on the same straight line, the clamping plates are made of aluminum alloy, the fixing pieces are carbon fiber adhesive tapes, outer shells are arranged on the outer walls of the clamping plates, and the two clamping plates and the battery cells are wrapped and fixed by the outer shells to form a single battery cell structure. The utility model has the advantages of simple structure, few parts, quickness and convenience in assembly, low use cost, small bulge, light weight and small occupied space.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a novel single-cell structure. Background Technology

[0002] Currently, widely produced soft-pack batteries such as lithium, sodium, and magnesium batteries often exhibit bulging, which reduces battery life. A search reveals that Chinese patent CN105609676A discloses a soft-pack battery module, including a soft-pack cell with positive and negative electrodes. A left and right plastic fixing frame are respectively provided on both sides of the soft-pack cell. Two surface-insulated aluminum sheets are provided on the outer side of the right plastic fixing frame. Bolt holes are provided at the upper and lower parts of the left and right plastic fixing frames, and interlocking buckles are provided on both sides. Wiring grooves are provided on the upper sides of the left and right plastic fixing frames. The left plastic fixing frame, the soft-pack cell, the right plastic fixing frame, and the aluminum sheets are interlocked to form a soft-pack battery module unit. The soft-pack battery module unit is then stacked together. The body, with plastic side plates 1 and 2 with screw holes on both sides, is fixed into a whole by screws and nuts; a metal bracket with two nuts for riveting is provided on the top of the adjacent soft-pack battery module unit; a top cover with buckles on both sides is snapped onto the top of the soft-pack battery module unit. The above patent has the following shortcomings: First, the above patent has many structural components, and the bolt connection after buckling makes the structure complex, the assembly time-consuming and labor-intensive, the use cost high, and it is not convenient for mass production; Second, the above patent only sets aluminum sheets on the plastic right fixing frame, which causes the battery to bulge on the side without aluminum sheet coverage, reducing the life of the cell; Third, the fixing frame, buckles, bolts, etc. make the battery pack large in size and occupy a lot of space, which cannot be used for some electrical appliances with limited size. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a novel single-cell structure that is simple in structure, has few components, is quick and easy to assemble, has low operating costs, small bulge, light weight, and occupies little space.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A novel single-cell battery structure includes a battery cell, characterized in that: clamping plates are respectively provided on both sides of the battery cell, the two clamping plates clamp the battery cell and are fixedly connected by fasteners, so as to facilitate assembly. The clamping plates are respectively attached to both sides of the battery cell, and the two clamping plates are fixedly connected to clamp the battery cell to form a battery cell structure.

[0006] The clamping plate of this utility model is provided with at least one weight reduction hole, so as to reduce the weight of the clamping plate through the weight reduction hole, thereby reducing the weight of the entire cell structure.

[0007] The battery cell of this invention is provided with a positioning hole, the axis of which is on the same straight line as the axis of the weight reduction hole. This facilitates the assembly of the clamping plate by matching the positioning hole with the weight reduction hole, enabling the clamping plate to be installed quickly. At the same time, the positioning hole can also reduce the weight of the battery cell, thereby reducing the weight of the entire battery cell structure.

[0008] The clamping plate described in this utility model is a copper plate, or an iron plate, or a carbon fiber plate, or a glass plate, or a plastic plate, or a wooden plate.

[0009] The clamping plate of this utility model is made of aluminum alloy, and the hardness of the clamping plate is an aluminum alloy plate with a Webster hardness > 2.5HW, or a Brinell hardness > 25HB, or a Vickers hardness > 50HV, or a Rockwell hardness > 40HRB, so as to suppress battery bulging by using the aluminum alloy plate.

[0010] The length of the clamping plate of this utility model is matched with the length of the battery cell, and the error between the length of the clamping plate and the length of the battery cell is between ±0.1-5mm. The width of the clamping plate is matched with the width of the battery cell, and the error between the width of the clamping plate and the width of the battery cell is between ±0.1-5mm.

[0011] The fastener described in this utility model is an adhesive tape. The two clamps are fixedly connected by the adhesive tape, so that the two clamps can be quickly connected together by the adhesive tape.

[0012] The tape described in this utility model is a carbon fiber tape with a thickness of 0.1mm-5mm. The material of the carbon fiber tape is a carbon fiber material with a tensile strength >100Mpa and a cellulose content >20tex.

[0013] The fixing component described in this utility model is a fixing line. The two clamps are fixedly connected by winding the fixing line, so as to quickly connect the two clamps by winding the fixing line.

[0014] The outer wall of the clamping plate of this utility model is provided with an outer shell. The outer shell covers and fixes the two clamping plates and the battery cell to form a single battery cell structure. By setting the outer shell on the outside of the clamping plate, the battery cell and the clamping plate are wrapped by the outer shell to form a single battery cell structure.

[0015] The present invention provides an outer shell between the battery cell and the clamping plate. The outer shell is fixedly connected to the battery cell. Two clamping plates hold the outer shell and are fixedly connected by fasteners to form a single battery cell structure, so that the battery cell is wrapped by the outer shell. Then, clamping plates are set on both sides of the outer shell, and the clamping plates hold the outer shell to form a single battery cell structure.

[0016] The outer shell of this utility model is an aluminum-plastic film.

[0017] This utility model, due to the above-mentioned structure, has the advantages of simple structure, few parts, quick and convenient assembly, low cost of use, small bulge, light weight, and small space occupation. Attached Figure Description

[0018] Figure 1 This is a data curve obtained from the control group and experimental group in this utility model in the following tests: thickness test after 7 days of high temperature storage, discharge test after 7 days of high temperature storage, capacity change test after 500 cycles, discharge test at -10℃, 5C discharge test, 3C charging test, and internal resistance change test after 7 days of high temperature storage.

[0019] Figure 2 This is a schematic diagram of the structure of this utility model.

[0020] Figure 3 This is a utility model Figure 2 A schematic diagram of the outer shell removed.

[0021] Figure 4 This is a utility model Figure 2 A schematic diagram showing the outer shell cut away from the side.

[0022] Figure 5 This is a utility model Figure 2 A side sectional view.

[0023] Figure 6 This is a utility model Figure 2 Another structural diagram with the outer shell removed.

[0024] Figure 7 This is a utility model Figure 2 Another side sectional view.

[0025] Figure 8 This is another structural schematic diagram of the present invention.

[0026] Figure 9 This is a utility model Figure 8 A sectional view.

[0027] Reference numerals: 1. Battery cell; 2. Clamping plate; 3. Fixing component; 4. Weight reduction hole; 5. Positioning hole; 6. Outer casing. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] As attached Figure 2-7A novel single-cell battery structure includes a battery cell 1, characterized in that: clamping plates 2 are respectively provided on both sides of the battery cell 1, the length of the clamping plates 2 is matched with the length of the battery cell 1, the width of the clamping plates 2 is matched with the width of the battery cell 1, the two clamping plates 2 clamp the battery cell 1 and are fixedly connected by a fixing member 3, so as to facilitate assembly. The clamping plates 2 are respectively attached to both sides of the battery cell, and the two clamping plates are fixedly connected to clamp the battery cell to form a battery cell structure.

[0031] The clamping plate 2 of this utility model is provided with at least one weight reduction hole 4, so as to reduce the weight of the clamping plate through the weight reduction hole, thereby reducing the weight of the entire battery cell structure.

[0032] The battery cell 1 of this utility model is provided with a positioning hole 5. The axis of the positioning hole 5 is on the same straight line as the axis of the weight reduction hole 4, so as to facilitate the assembly of the clamping plate by cooperating with the positioning hole and the weight reduction hole, thereby realizing the quick installation of the clamping plate. At the same time, the positioning hole can also reduce the weight of the battery cell, thereby reducing the weight of the entire battery cell structure.

[0033] The clamping plate 2 of this utility model is made of aluminum alloy. The hardness of the clamping plate 2 is an aluminum alloy plate with a Webster hardness > 2.5HW, or a Brinell hardness > 25HB, or a Vickers hardness > 50HV, or a Rockwell hardness > 40HRB, so as to suppress battery bulging by using the aluminum alloy plate.

[0034] The error between the length of the clamping plate 2 and the length of the battery cell 1 is between ±0.1-5mm, and the error between the width of the clamping plate 2 and the width of the battery cell 1 is between ±0.1-5mm.

[0035] The fastener 3 described in this utility model is an adhesive tape. The two clamps 2 are fixedly connected by the adhesive tape, so that the two clamps can be quickly connected together by the adhesive tape.

[0036] The fixing component 3 of this utility model is a carbon fiber tape with a thickness of 0.1mm-5mm. The material of the carbon fiber tape is a carbon fiber material with a tensile strength >100Mpa and a cellulose content >20tex.

[0037] The outer wall of the clamping plate 2 of this utility model is provided with an outer shell 6. The outer shell 6 covers and fixes the two clamping plates 2 and the battery cell 1 to form a single battery cell 1 structure. By setting the outer shell on the outside of the clamping plate, the battery cell and the clamping plate are wrapped by the outer shell to form a single battery cell structure.

[0038] The outer shell 6 of this utility model is an aluminum-plastic film.

[0039] As attached Figure 1To further illustrate the technical effects of this utility model, two sets of experiments were conducted. One set of cells 1 with a clamping plate 2 on the outside served as the experimental group, while the other set of cells 1 without the clamping plate 2 served as the control group. The experimental and control groups were identical in structure except for the clamping plate 2. The two sets of cell structures underwent a seven-day high-temperature storage thickness test, a seven-day high-temperature storage discharge test, a 500-cycle capacity change test, a -10℃ discharge test, a 5C discharge test, a 3C charging test, and a seven-day high-temperature storage internal resistance change test. The resulting curve data are shown in the attached figure. Figure 1 ,

[0040] Appendix Figure 1 (a) The thickness change curves of the experimental group and the control group after 7 days of high temperature storage are shown. The curve of the control group is above the curve of the experimental group. It can be seen that under the high temperature environment, as the storage time is extended, the thickness change of the experimental group is much smaller than that of the control group. That is, the clamp 2 plays a role in suppressing the bulging of the battery cell.

[0041] Appendix Figure 1 (b) Display the discharge change curves of the experimental group and the control group after 7 days of high temperature storage. The curve of the experimental group is above the curve of the control group. It can be seen that under the same voltage conditions, as the storage time is extended in the high temperature environment, the cell capacity of the experimental group is larger and longer than that of the control group. That is, the experimental group has more power and the cell life of the experimental group is longer.

[0042] Appendix Figure 1 (c) Display the capacity change curves of the experimental group and the control group after 500 cycles. The curve of the experimental group is above the curve of the control group. It can be seen that under the same number of cycles, the cell capacity of the experimental group is greater than that of the control group. The larger the cell capacity, the longer the cell life.

[0043] Appendix Figure 1 (d) Shows the discharge change curves of the experimental group and the control group at -10℃. The curve of the experimental group is gentler than that of the control group. It can be seen that under the same voltage conditions, the cell capacity of the experimental group is greater than that of the control group. The larger the cell capacity, the longer the cell life.

[0044] Appendix Figure 1 (e) Shows the 5C discharge change curves of the experimental group and the control group. 5C discharge refers to the battery being discharged at a current of 5 times the rated capacity. It can be seen that under the same voltage conditions, the cell capacity of the experimental group is greater than that of the control group. A larger cell capacity means a longer cell lifespan.

[0045] Appendix Figure 1(f) Shows the 3C charging change curves of the experimental group and the control group. 3C charging refers to charging with a current three times the battery capacity. The curve of the control group is above the curve of the experimental group. It can be seen that under the same voltage conditions, the cell capacity of the experimental group is greater than that of the control group. A larger cell capacity means a longer cell life.

[0046] Appendix Figure 1 (g) Display the internal resistance change curves of the experimental group and the control group after 7 days of high-temperature storage. The curve of the control group is above the curve of the experimental group. It can be seen that under the same time conditions, the change in internal resistance of the control group is much greater than that of the experimental group. A large change in battery internal resistance will lead to an increase in the internal temperature of the battery and spontaneous combustion. It can be seen that the change in internal resistance of the battery cell in the experimental group is not large, which can reduce the spontaneous combustion of the battery cell to a certain extent. It can be seen from the above that by setting a clamping plate 2 on the outside of the battery cell 1 and clamping and fixing the battery cell 1 with two clamping plates 2, this utility model can not only effectively suppress the bulging phenomenon of the battery cell 1, but also extend the service life of the battery cell 1 and reduce the probability of spontaneous combustion of the battery cell 1 during high-temperature storage.

[0047] Example 2

[0048] As attached Figure 8-9 A novel single-cell battery structure includes a battery cell 1, characterized in that: clamping plates 2 are respectively provided on both sides of the battery cell 1, the length of the clamping plates 2 matches the length of the battery cell 1, the width of the clamping plates 2 matches the width of the battery cell 1, the two clamping plates 2 clamp the battery cell 1, and are fixedly connected by a fixing member 3, so as to facilitate assembly. The clamping plates are attached to both sides of the battery cell, and the two clamping plates are fixedly connected to clamp the battery cell to form a battery cell structure.

[0049] The clamping plate 2 of this utility model is provided with at least one weight reduction hole 4, so as to reduce the weight of the clamping plate through the weight reduction hole, thereby reducing the weight of the entire battery cell structure.

[0050] The clamping plate 2 described in this utility model is a copper plate, or an iron plate, or a carbon fiber plate, or a glass plate, or a plastic plate, or a wooden plate.

[0051] The clamping plate 2 of this utility model is made of aluminum alloy. The hardness of the clamping plate 2 is an aluminum alloy plate with a Webster hardness > 2.5HW, or a Brinell hardness > 25HB, or a Vickers hardness > 50HV, or a Rockwell hardness > 40HRB, so as to suppress battery bulging by using the aluminum alloy plate.

[0052] The error between the length of the clamping plate 2 and the length of the battery cell 1 is between ±0.1-5mm, and the error between the width of the clamping plate 2 and the width of the battery cell 1 is between ±0.1-5mm.

[0053] The fastener 3 described in this utility model is an adhesive tape. The two clamps 2 are fixedly connected by the adhesive tape, so that the two clamps can be quickly connected together by the adhesive tape.

[0054] The fixing component 3 of this utility model is a carbon fiber tape with a thickness of 0.1mm-5mm. The material of the carbon fiber tape is a carbon fiber material with a tensile strength >100Mpa and a cellulose content >20tex.

[0055] The fixing element 3 of this utility model is a fixing line. The two clamping plates 2 are fixedly connected by the fixing line, so as to quickly connect the two clamping plates by winding the fixing line.

[0056] The present invention provides an outer shell 6 between the battery cell 1 and the clamping plate 2. The outer shell 6 is fixedly connected to the battery cell 1. The two clamping plates 2 clamp the outer shell 6 and are fixedly connected by the fixing member 3 to form a single battery cell 1 structure, so that the battery cell is wrapped by the outer shell. Then, clamping plates are set on both sides of the outer shell, and the clamping plates clamp the outer shell to form a single battery cell structure.

[0057] The outer shell 6 of this utility model is an aluminum-plastic film.

[0058] In this invention, the number of weight-reducing holes 4 and positioning holes 5 is not limited. Positioning holes 5 can be provided on the battery cell 1, or they can be omitted, as needed. The battery cell 1 is the existing battery cell 1. Providing positioning holes 5 on the battery cell 1 changes the circuit layout of the battery cell 1, but the internal circuit connection relationship of the battery cell 1 remains unchanged.

[0059] As attached Figure 2-7 This is a structural schematic diagram of Embodiment 1 of the present utility model, attached. Figure 2-5 In the middle, cell 1 does not have positioning holes, attached Figure 6-7 In this design, positioning holes 5 are provided on the battery cell 1, which are connected to weight reduction holes 4, thus facilitating quick and easy positioning of the clamping plates 2. The two clamping plates 2 hold the battery cell 1 and are fixed with adhesive tape. Then, an outer shell 6 is fitted over the clamping plates 2 and the battery cell 1 to form the battery cell structure. Assembly is quick and convenient, facilitating mass production and reducing operating costs.

[0060] As attached Figure 8-9 This is a schematic diagram of the structure of Embodiment 2 of the present invention. In Embodiment 2, the outer shell 6 is fixed to the outside of the battery cell 1 to wrap and fix the battery cell 1. Clamping plates 2 are provided on the upper and lower sides of the outer shell 6. The two clamping plates 2 are fixed with tape. The clamping plates 2 clamp the outer shell 6, and then clamp the battery cell 1 to form a battery cell structure. The structure is simple, easy to assemble quickly, and has low cost.

[0061] This utility model, due to the above-mentioned structure, has the advantages of simple structure, few parts, quick and convenient assembly, low cost of use, small bulge, light weight, and small space occupation.

Claims

1. A novel single-cell battery structure, comprising a battery cell (1), characterized in that: The battery cell (1) is provided with clamping plates (2) on both sides. The two clamping plates (2) clamp the battery cell (1) and are fixedly connected by a fixing member (3). The clamping plate (2) is provided with at least one weight reduction hole (4). The battery cell (1) is provided with a positioning hole (5). The axis of the positioning hole (5) and the axis of the weight reduction hole (4) are on the same straight line. The length of the clamping plate (2) matches the length of the battery cell (1). The error between the length of the clamping plate (2) and the length of the battery cell (1) is between ±0.1-5mm. The width of the clamping plate (2) matches the width of the battery cell (1). The error between the width of the clamping plate (2) and the width of the battery cell (1) is between ±0.1-5mm.

2. The novel single-cell battery structure according to claim 1, characterized in that: The material of the clamping plate (2) is aluminum alloy, and the hardness of the clamping plate (2) is an aluminum alloy plate with Webster hardness > 2.5HW, or Brinell hardness > 25HB, or Vickers hardness > 50HV, or Rockwell hardness > 40HRB, or the clamping plate (2) is a copper plate, or the clamping plate (2) is an iron plate, or the clamping plate (2) is a carbon fiber plate, or the clamping plate (2) is a glass plate, or the clamping plate (2) is a plastic plate, or the clamping plate (2) is a wooden board.

3. A novel single-cell battery structure according to claim 1 or 2, characterized in that: The fastener (3) is tape, and the two clamps (2) are fixedly connected by tape, or the fastener (3) is a fixing wire, and the two clamps (2) are fixedly connected by the fixing wire.

4. The novel single-cell battery structure according to claim 3, characterized in that: The tape is a carbon fiber tape with a thickness of 0.1mm-5mm. The material of the carbon fiber tape is a carbon fiber material with a tensile strength >100Mpa and a cellulose content >20tex.

5. A novel single-cell battery structure according to claim 1, 2, or 4, characterized in that: The outer wall of the clamp (2) is provided with an outer shell (6), which covers and fixes the two clamps (2) and the battery cell (1) to form a single battery cell structure.

6. A novel single-cell battery structure according to claim 1, 2, or 4, characterized in that: An outer shell (6) is provided between the battery cell (1) and the clamping plate (2). The outer shell (6) is fixedly connected to the battery cell (1). The two clamping plates (2) clamp the outer shell (6) and are fixedly connected by the fixing member (3) to form a single battery cell structure.

7. The novel single-cell battery structure according to claim 5, characterized in that: The outer shell (6) is made of aluminum-plastic film.

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