Lithium battery

Abstract

The utility model relates to the field of batteries, in particular to a lithium battery which comprises a plurality of battery cells and heating sheets, a heating gap is formed between every two adjacent battery cells, the heating sheets are located in the heating gaps, and the heating sheets and the surfaces of the battery cells are arranged at intervals. The battery pack has the effect that the battery cell and the heating sheet are not easy to extrude.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a lithium battery. Background Art

[0002] Lithium batteries are a type of power source widely used in motorcycles. They typically have multiple cells inside to ensure the battery's output power.

[0003] In existing technologies, lithium batteries are often equipped with a heating plate to adapt to low-temperature environments. The heating plate fits snugly on the surface of the battery cell. When the ambient temperature is low, the heating plate heats the surface of the battery cell, maintaining a suitable operating environment for the battery cell.

[0004] For example, the utility model patent with announcement number CN 208208938 U discloses a utility model of a cylindrical battery cell structure with an electric heating plate, comprising a copper current-carrying plate, a nickel plate, and two side-by-side rows of cells, with an electric heating plate sandwiched between the side-by-side rows of cells. Each row of cells is composed of multiple cylindrical cells. The copper current-carrying plate is provided at the positive and negative ends of the cylindrical cells, and is provided with through-holes matching the electrodes of the cylindrical cells. The nickel plate is provided between the copper current-carrying plate and the cylindrical cells, and is provided with through-holes matching the electrodes of the cylindrical cells. The nickel plate is fixedly connected to the electrodes of the cylindrical cells, and is provided with lugs on both sides of the nickel plate, and the copper current-carrying plate is provided with grooves matching the lugs. This utility model sandwiches the electric heating plate between the cylindrical cells, thereby improving heating efficiency and increasing the space utilization of the battery structure.

[0005] Regarding the above-mentioned related technologies, the battery cell will inevitably expand during the liquid injection and packaging process and during use, which will cause compression between the battery cell and the heating plate, making the battery cell and the heating plate susceptible to damage. Summary of the Invention

[0006] In order to prevent compression between the battery cell and the heating plate, the present application provides a lithium battery.

[0007] The lithium battery provided in this application adopts the following technical solution:

[0008] A lithium battery comprises a battery cell and a heating plate. The battery cells are provided in plurality, a heating gap is provided between two adjacent battery cells, the heating plate is located in the heating gap, and a gap is provided between the heating plate and the surface of the battery cell.

[0009] By adopting the above technical solution, when the battery cell expands during the liquid injection and packaging process and during use, the heating gap provides space for the expansion of the battery cell, making it less likely for the battery cell and the heating plate to be squeezed, thereby reducing the occurrence of battery cell leakage or heating plate wear.

[0010] Optionally, the gap width between the heating plate and the surface of the battery core is 1-2 mm.

[0011] By adopting the above technical solution, it is beneficial to ensure that the heating effect of the heating plate is ensured while preventing compression from occurring between the battery cell and the heating plate.

[0012] Optionally, a gap retaining member is provided in the heating gap, and two sides of the gap retaining member are respectively connected to surfaces of two adjacent battery cells.

[0013] By adopting the above technical solution, the gap retaining member prevents the battery cells from being brought close to each other due to bumps during use of the motorcycle, thereby helping to reduce the occurrence of squeezing between the battery cells and the heating plate.

[0014] Optionally, the gap maintaining member is elastic.

[0015] By adopting the above technical solution, during the use of the motorcycle, the battery cells can absorb part of the vibration and impact through the gap retaining member, thereby reducing the occurrence of damage to the battery cell surface.

[0016] Optionally, one side of the gap retainer is fixedly connected to one of the two adjacent battery cells.

[0017] By adopting the above technical solution, it is convenient to separate and replace several battery cells separately during maintenance, reducing the need to replace multiple battery cells at the same time.

[0018] Optionally, the gap retaining member is arranged close to the edge of the battery core, and the heating plate is arranged close to the center of the battery core.

[0019] By adopting the above technical solution, the gap maintaining member is positioned away from the center of the battery cell, which is more prone to collision, making it less likely for the battery cell to be squeezed against the gap maintaining member. This also facilitates the heating plate to heat the central working area of ​​the battery cell, thereby ensuring a good heating effect.

[0020] Optionally, the heating plate is provided with a plurality of “J”-shaped bending sections, the plurality of bending sections of the heating plate are respectively arranged in one-to-one correspondence with each battery core, and the bending sections of the heating plate are arranged around the battery core.

[0021] By adopting the above technical solution, the thermal contact area between the heating plate and the battery core is increased, thereby facilitating ensuring the heating effect.

[0022] Optionally, a bending groove is formed through the bending section of the heating plate, and the bending groove is located at a corner of the bending section of the heating plate.

[0023] By adopting the above technical solution, the heating plate is easy to bend, which is conducive to reducing the difficulty of bending the heating plate and reducing the internal stress generated by the heating plate during the bending process, so that the heating plate is not easy to squeeze the battery cell due to rebound.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. When the battery cell expands during the liquid filling and packaging process and during use, the heating gap provides space for the expansion of the battery cell, making it less likely for the battery cell and the heating plate to be squeezed, thereby reducing the occurrence of battery cell leakage or heating plate wear;

[0026] 2. The gap retainer prevents the battery cells from being brought close to each other due to bumps during use of the motorcycle, thereby reducing the occurrence of squeezing between the battery cells and the heating plate;

[0027] 3. The gap maintainer is placed away from the center of the battery cell, which is more prone to collision. This prevents the battery cell from being squeezed against the gap maintainer. This also makes it easier for the heating plate to heat the central working area of ​​the battery cell, thereby ensuring a good heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the distribution of the battery cells and heating plates in the embodiment of the present application.

[0030] Figure 3 yes Figure 2 An enlarged schematic diagram of part A.

[0031] Figure 4 This is a schematic diagram of the cooperation between the gap retainer and the battery cell in an embodiment of the present application.

[0032] Figure 5 It is an overall schematic diagram of the heating plate of the embodiment of the present application.

[0033] Explanation of the accompanying drawings: 1. battery cell; 101. heating gap; 2. heating plate; 201. bending groove; 21. bending section; 3. gap maintaining member; 4. battery casing. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The present application embodiment discloses a lithium battery for powering a motorcycle. Figure 1 and Figure 2The lithium battery includes a battery housing 4, a battery core 1 and a heating plate 2. The battery core 1 and the heating plate 2 are both located in the battery housing 4. There are a plurality of battery cores 1, each of which is in a rectangular parallelepiped shape and is arranged in parallel.

[0036] Reference Figure 2 and Figure 3 A heating gap 101 is provided between two adjacent battery cells 1 , and the width of the heating gap 101 is 3-6 mm, so that the two adjacent battery cells 1 are not easily in direct contact, thereby reducing the occurrence of mutual squeezing of the two adjacent battery cells 1 .

[0037] Reference Figure 2 and Figure 3 Two gap retainers 3 are provided in the heating gap 101. The two gap retainers 3 are spaced apart from each other in the horizontal direction, and both gap retainers 3 are provided close to the edge of the battery cell 1. Figure 4 One side of the gap retainer 3 is fixedly adhered to the surface of one of the two adjacent battery cells 1, and the other side of the gap retainer 3 is tightly fitted to the surface of the other of the two adjacent battery cells 1, so that the gap retainer 3 can prevent the distance between the two adjacent battery cells 1 from being too small. The gap retainer 3 is arranged in a long strip shape, and the gap retainer 3 has elasticity, such as sponge, rubber or cotton fabric. Specifically in the embodiment of the present application, the material of the gap retainer 3 is rubber, so that during the use of the motorcycle, the battery cell 1 can absorb part of the vibration and impact through the gap retainer 3, thereby reducing the occurrence of damage to the surface of the battery cell 1.

[0038] Reference Figure 2 and Figure 5 , the heating plate 2 is arranged near the center of the battery cell 1, and the heating plate 2 is located between two adjacent gap retaining members 3. The heating plate 2 is provided with a plurality of "J"-shaped bending sections 21, and the plurality of bending sections 21 of the heating plate 2 are respectively arranged in a one-to-one correspondence with each battery cell 1. The bending sections 21 of the heating plate 2 are arranged around the heating plate 2 of the battery cell 1, and both ends of the bending sections 21 are located within the heating gap 101, and the gap width between the bending sections 21 and the surface of the battery cell 1 is 1-2mm, so that the two adjacent battery cells 1 are not easily squeezed by the heating plate 2 after expansion, and at the same time, the heating effect of the heating plate 2 is ensured.

[0039] Reference Figure 5 The bending section 21 of the heating plate 2 is provided with a plurality of bending grooves 201, each located at a corner of the bending section 21 of the heating plate 2. The bending grooves 201 extend along the width of the heating plate 2, and the inner corners of the bending grooves 201 are arc-shaped, which facilitates bending of the heating plate 2, reduces the difficulty of bending the heating plate 2, and reduces its rebound.

[0040] The implementation principle of a lithium battery in an embodiment of the present application is: when the battery cell 1 expands during the liquid injection and packaging process or during use, the heating gap 101 provides space for the expansion of the battery cell 1, and the gap maintaining member 3 makes the width of the heating gap 101 not easy to be too small, which is beneficial to reduce the extrusion between the battery cell 1 and the heating plate 2, and reduce the occurrence of liquid leakage of the battery cell 1 or wear of the heating plate 2.

[0041] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A lithium battery, characterized in that: The invention comprises a battery core (1) and a heating plate (2), wherein the battery core (1) is provided with a plurality of heating plates, a heating gap (101) is provided between two adjacent battery cores (1), the heating plate (2) is located in the heating gap (101), and a gap is provided between the heating plate (2) and the surface of the battery core (1).

2. A lithium battery according to claim 1, characterized in that: The width of the gap between the heating plate (2) and the surface of the battery core (1) is 1-2 mm.

3. A lithium battery according to claim 1, characterized in that: A gap retaining member (3) is provided in the heating gap (101), and two sides of the gap retaining member (3) are respectively connected to the surfaces of two adjacent battery cells (1).

4. A lithium battery according to claim 3, characterized in that: The gap maintaining member (3) is elastic.

5. A lithium battery according to claim 3, characterized in that: One side of the gap retaining member (3) is fixedly connected to one of the two adjacent battery cells (1).

6. A lithium battery according to claim 3, characterized in that: The gap retaining member (3) is arranged close to the edge of the battery core (1), and the heating plate (2) is arranged close to the center of the battery core (1).

7. The lithium battery according to claim 1, wherein: The heating plate (2) is provided with a plurality of "J"-shaped bending sections (21), the plurality of bending sections (21) of the heating plate (2) are respectively arranged in one-to-one correspondence with each battery core (1), and the bending sections (21) of the heating plate (2) are arranged around the battery core (1).

8. A lithium battery according to claim 7, characterized in that: A bending groove (201) is provided through the bending section (21) of the heating plate (2), and the bending groove (201) is located at the corner of the bending section (21) of the heating plate (2).

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