Lithium battery cell structure

Abstract

The utility model relates to a kind of lithium battery cell structure, including several lithium battery groups and the first end frame and the second end frame of opposite arrangement, the side of the first end frame towards second end frame is equipped with several first end frame part battery mounting hole, the side of the second end frame towards first end frame is equipped with several second end frame part battery mounting hole, the one end of all lithium batteries is one-to-one correspondingly arranged in the first end frame part battery mounting hole, the other end is one-to-one correspondingly arranged in the second end frame part battery mounting hole, lithium battery in the same group lithium battery group is connected together in parallel, all lithium battery group is connected together in series.The utility model aims at providing a kind of lithium battery cell structure, lithium battery is arranged neatly and fixed reliably, solve the problem of existing lithium battery cell fixed unreliable.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a lithium battery cell structure. Background Technology

[0002] A lithium battery is a battery whose electrochemical system contains lithium (including metallic lithium, lithium alloys, lithium ions, and lithium polymers). Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. Lithium metal batteries are typically non-rechargeable and contain metallic lithium. Lithium-ion batteries do not contain metallic lithium and are rechargeable. In use, multiple lithium batteries are connected in series and parallel within a casing to form a battery with the required voltage and capacity. Current lithium battery casings are sealed, preventing independent cell replacement; the casing cannot secure the internal components; and the wiring for series and parallel connections is complex. Utility Model Content

[0003] The present invention aims to provide a lithium battery cell structure that is neatly arranged and reliably fixed, solving the problem of unreliable fixing of existing lithium battery cells.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a lithium battery cell structure, characterized in that it includes a plurality of lithium battery packs and a first end frame and a second end frame arranged opposite each other. The first end frame has a plurality of first end frame battery mounting holes on its side facing the second end frame, and the second end frame has a plurality of second end frame battery mounting holes on its side facing the first end frame. One end of each lithium battery is inserted into a corresponding first end frame battery mounting hole, and the other end is inserted into a corresponding second end frame battery mounting hole. Lithium batteries in the same lithium battery pack are connected in parallel, and all lithium battery packs are connected in series. The positioning and fixing of the lithium batteries is reliable.

[0005] Preferably, the upper surface of the first end bracket is provided with a first end bracket portion limiting hole, and the upper surface of the second end bracket is provided with a second end bracket portion limiting hole. The first end bracket portion limiting hole and the second end bracket portion limiting hole are used for the locating pin fitted onto the outer casing to pass through. This allows the battery cells to be dispersed using the outer casing, resulting in good connection reliability.

[0006] Preferably, the lithium battery pack has a first conductive plate at one end and a second conductive plate at the other end. The first conductive plate is located on the side of the first end frame away from the second end frame, and the second conductive plate is located on the side of the second end frame away from the first end frame. One electrode of the same polarity from each lithium battery in the lithium battery pack is connected to the first conductive plate via a first connecting electrode, and the other electrode of the same polarity is connected to the second conductive plate via a second connecting electrode. This provides a technical solution for parallel connection of lithium battery packs. Then, by connecting the corresponding first and second conductive plates together, a series connection between the lithium battery packs is achieved, making the connection convenient.

[0007] Preferably, the bottom wall of the battery mounting hole in the first end bracket is provided with a first end bracket through hole, and the bottom wall of the battery mounting hole in the second end bracket is provided with a second end bracket through hole. The first connecting electrode is connected to one polarity electrode of the lithium battery through the first end bracket through hole, and the second connecting electrode is connected to the other polarity electrode of the lithium battery through the second end bracket through hole. This design facilitates the connection of the lithium battery to the conductive sheet and results in a compact structure.

[0008] Preferably, the first connecting electrode is welded together with both the electrode and the first conductive sheet, and the second connecting electrode is welded together with both the electrode and the second conductive sheet. This ensures a reliable connection.

[0009] Preferably, the surface of the first end bracket away from the second end bracket has a first end bracket recess that corresponds to the limiting hole of the first end bracket, and the surface of the second end bracket away from the first end bracket has a second end bracket recess that corresponds to the limiting hole of the second end bracket. The first conductive sheet has a first conductive sheet protrusion that corresponds to the first end bracket recess, and the second conductive sheet has a second conductive sheet protrusion that corresponds to the second end bracket recess. This improves connection reliability.

[0010] Preferably, a first engaging protrusion is formed between adjacent first end frame recesses, and a first engaging groove is formed between adjacent first conductive sheet protrusions, with the first engaging protrusion engaging within the first engaging groove; a second engaging protrusion is formed between adjacent second end frame recesses, and a second engaging groove is formed between adjacent second conductive sheet protrusions, with the second engaging protrusion engaging within the second engaging groove. This further improves connection reliability and structural strength.

[0011] Preferably, the first end frame is provided with a plurality of first end frame heat dissipation through holes extending through the first end frame along the length direction of the lithium battery, and the second end frame is provided with a plurality of second end frame heat dissipation through holes extending through the second end frame along the length direction of the lithium battery. This can improve the heat dissipation effect of the battery cell.

[0012] Preferably, four first end-frame limiting holes surround one first end-frame heat dissipation through-hole, and four second end-frame limiting holes surround one second end-frame heat dissipation through-hole. This allows for uniform heat dissipation for each lithium battery.

[0013] The present invention has the following advantages: the lithium battery cells in the battery cell are arranged neatly; the wiring is neat. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention from one perspective;

[0015] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention.

[0016] In the figure: First end frame 8, Second end frame 9, Lithium battery 10, First end frame limiting hole 11, Second end frame limiting hole 12, Positioning pin 13, First conductive sheet 14, Second conductive sheet 15, Bottom wall of battery mounting hole in first end frame 16, Bottom wall of battery mounting hole in second end frame 17, Recess in first end frame 18, Recess in second end frame 19, Protrusion in first conductive sheet 20, Protrusion in second conductive sheet 21, Second snap-fit ​​protrusion 23, Heat dissipation through hole in first end frame 45, Heat dissipation through hole in second end frame 25, Battery mounting hole in first end frame 47, Battery mounting hole in second end frame 48. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] See Figure 1 and Figure 2A lithium battery cell structure includes several lithium battery packs (four lithium battery packs in this embodiment) and a first end frame 8 and a second end frame 9 arranged opposite each other. The first end frame has several first end frame battery mounting holes 47 on the side facing the second end frame, and the second end frame has several second end frame battery mounting holes 48 on the side facing the first end frame. One end of each lithium battery 10 is inserted into a corresponding first end frame battery mounting hole, and the other end is inserted into a corresponding second end frame battery mounting hole. Lithium batteries in the same battery pack are connected in parallel. Each battery pack includes four 3.2-volt lithium batteries 10. All the lithium battery packs (four battery packs in this embodiment) are connected in series, so the output voltage of this invention is 12.8 volts. The upper surface of the first end frame is provided with a first end frame limiting hole 11, and the upper surface of the second end frame is provided with a second end frame limiting hole 12. Two positioning pins 13 are provided on the inner surface of the cover; one positioning pin passes through the first end frame limiting hole, and the other positioning pin passes through the second end frame limiting hole. One end of the lithium battery pack is provided with a first conductive sheet 14, and the other end is provided with a second conductive sheet 15. The first conductive sheet is located on the side of the first end frame away from the second end frame, and the second conductive sheet is located on the side of the second end frame away from the first end frame. One electrode of the four lithium batteries in the lithium battery pack with the same polarity is connected to the first conductive sheet via a first connecting electrode (not shown), and another electrode of the same polarity is connected to the second conductive sheet via a second connecting electrode (not shown). The bottom wall 16 of the battery mounting hole in the first end frame has a first end frame through hole, and the bottom wall 17 of the battery mounting hole in the second end frame has a second end frame through hole. The first connecting electrode is connected to one polarity electrode of the lithium battery through the first end frame through hole, and the second connecting electrode is connected to the other polarity electrode of the lithium battery through the second end frame through hole. The first connecting electrode is welded to both the electrode and the first conductive sheet, and the second connecting electrode is welded to both the electrode and the second conductive sheet. The surface of the first end frame away from the second end frame has a first end frame recess 18 that corresponds to the limiting hole of the first end frame. The surface of the second end frame away from the first end frame has a second end frame recess 19 that corresponds to the limiting hole of the second end frame. The first conductive sheet has a first conductive sheet protrusion 20 that corresponds to the first conductive sheet protrusion 20 that passes through the first end frame recess, and the second conductive sheet has a second conductive sheet protrusion 21 that corresponds to the second end frame recess. The four lithium battery packs need to be connected in series. The first conductive sheet of each lithium battery pack is connected together, and the second conductive sheet is connected together, thus achieving series connection.A first engaging protrusion 21 is formed between adjacent recesses of the first end frame portion, and a first engaging groove is formed between adjacent protrusions of the first conductive sheet portion, with the first engaging protrusion engaging within the first engaging groove; a second engaging protrusion 23 is formed between adjacent recesses of the second end frame portion, and a second engaging groove is formed between adjacent protrusions of the second conductive sheet portion, with the second engaging protrusion engaging within the second engaging groove. The first end frame is provided with a plurality of first end frame portion heat dissipation through holes 45 extending along the length of the lithium battery, and the second end frame is provided with a plurality of second end frame portion heat dissipation through holes 25 extending along the length of the lithium battery. Four first end frame portion limiting holes surround one first end frame portion heat dissipation through hole, and four second end frame portion limiting holes surround one second end frame portion heat dissipation through hole.

Claims

1. A lithium battery cell structure, characterized in that, It includes several lithium battery packs and a first end frame and a second end frame arranged opposite each other. The first end frame has several first end frame battery mounting holes on the side facing the second end frame, and the second end frame has several second end frame battery mounting holes on the side facing the first end frame. One end of each lithium battery is inserted into the first end frame battery mounting hole, and the other end is inserted into the second end frame battery mounting hole. Lithium batteries in the same lithium battery pack are connected in parallel, and all lithium battery packs are connected in series.

2. The lithium battery cell structure according to claim 1, characterized in that, The upper end face of the first end frame is provided with a first end frame portion limiting hole, and the upper end face of the second end frame is provided with a second end frame portion limiting hole. The first end frame portion limiting hole and the second end frame portion limiting hole are used for the positioning pin sleeved on the outer shell to pass through.

3. The lithium battery cell structure according to claim 1, characterized in that, The lithium battery pack has a first conductive sheet at one end and a second conductive sheet at the other end. The first conductive sheet is located on the side of the first end frame away from the second end frame, and the second conductive sheet is located on the side of the second end frame away from the first end frame. In the lithium battery pack, one electrode of the same polarity of all lithium batteries is connected to the first conductive sheet through a first connecting electrode, and the other electrode of the same polarity is connected to the second conductive sheet through a second connecting electrode.

4. A lithium battery cell structure according to claim 3, characterized in that, The bottom wall of the battery mounting hole of the first end frame is provided with a first end frame through hole, and the bottom wall of the battery mounting hole of the second end frame is provided with a second end frame through hole. The first connecting electrode is connected to one polarity electrode of the lithium battery through the first end frame through hole, and the second connecting electrode is connected to the other polarity electrode of the lithium battery through the second end frame through hole.

5. A lithium battery cell structure according to claim 3 or 4, characterized in that, The first connecting electrode is welded together with both the electrode and the first conductive sheet, and the second connecting electrode is welded together with both the electrode and the second conductive sheet.

6. A lithium battery cell structure according to claim 3 or 4, characterized in that, The first end frame has a first end frame recess on the side away from the second end frame, which is aligned with the limiting hole of the first end frame. The second end frame has a second end frame recess on the side away from the first end frame, which is aligned with the limiting hole of the second end frame. The first conductive sheet has a first conductive sheet protrusion that is aligned with the first end frame recess. The second conductive sheet has a second conductive sheet protrusion that is aligned with the second end frame recess.

7. A lithium battery cell structure according to claim 6, characterized in that, A first snap-fit ​​protrusion is formed between adjacent first end frame recesses, and a first snap-fit ​​groove is formed between adjacent first conductive sheet protrusions, with the first snap-fit ​​protrusion snapping into the first snap-fit ​​groove; a second snap-fit ​​protrusion is formed between adjacent second end frame recesses, and a second snap-fit ​​groove is formed between adjacent second conductive sheet protrusions, with the second snap-fit ​​protrusion snapping into the second snap-fit ​​groove.

8. A lithium battery cell structure according to claim 6, characterized in that, The first end frame is provided with a plurality of first end frame heat dissipation through holes that extend through the first end frame along the length direction of the lithium battery, and the second end frame is provided with a plurality of second end frame heat dissipation through holes that extend through the second end frame along the length direction of the lithium battery.

9. A lithium battery cell structure according to claim 8, characterized in that, Four first end-frame limiting holes surround one heat dissipation through hole of the first end frame, and four second end-frame limiting holes surround one heat dissipation through hole of the second end frame.

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