Battery pack with insulating plate

Abstract

The utility model provides a battery pack (100) with an insulating plate, which is characterized in that the battery pack (100) is provided with a battery pack (1), a connecting piece (3) and the insulating plate (2), the insulating plate is of a double-ring structure, the double rings of the double-ring structure are respectively provided with an opening, and the two surfaces of the insulating plate (2) are provided with adhesive stickers and are adhered to the edge parts of a plurality of single batteries (4) of the battery pack (1). The insulating plates (2) are not in direct contact with positive electrodes or negative electrodes of the single batteries (4), and the battery pack (1) is formed by connecting a plurality of single batteries (4) in a series combination manner.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery pack with insulating plate. BACKGROUND

[0002] In recent years, power storage devices, particularly secondary batteries, are widely used as small electronic machines such as mobile phones or notebook computers, electric vehicles, or power storage. In these electronic machines or automobile, power storage uses, it is therefore necessary to improve the electrochemical characteristics well. Battery packs are also used as power sources for power tools, electric toys, electric bicycles, electric vehicles, electric skateboards, cordless phones, and backup power supplies. Therefore, it is desirable to improve the electrochemical characteristics of the battery pack well and miniaturize it.

[0003] CN118137007A discloses a battery pack comprising: a base plate configured to include a cooling passage through which a refrigerant for cooling a plurality of battery modules circulates by bringing the battery modules into contact with a first surface of the base plate; a lower cover configured to cover a second surface of the base plate; a frame portion mounted on an upper side of the first surface of the base plate to accommodate the battery modules therein and coupled to each other by a fastening member; and an upper cover covering an upper portion of the frame portion, wherein a space between the frames constituting the frame portion is sealed by a sealing member, the battery modules each include: a first side plate configured to support a first side surface of a plurality of single battery cells; a second side plate configured to support a second side surface of the battery cells; a first end plate configured to have opposite ends connected to a first end of each of the first side plate and the second side plate by a fastening member; a second end plate configured to have opposite ends connected to a second end of each of the first side plate and the second side plate by a fastening member; an insulating plate configured to have a first end connected to a side surface of the first end plate and a second end connected to a side surface of the second end plate, and coated with an adhesive fixed to a side surface of the battery cell on an opposite side surface; and an upper plate configured to cover an upper portion of the battery cell.

[0004] The existing battery pack with insulating plate has the following problems: the insulating plate is located between two batteries, and the two side surfaces are in contact with the guide plates between the batteries, which has poor stability. Since the positive electrode of the battery is higher than the surface of the battery, after the battery is arranged in an L shape (hereinafter referred to as L shape), the battery will be bent significantly. Due to the bending phenomenon of the L-shaped battery, the straightness of the battery pack is poor, and the appearance and size of the battery pack are not good. SUMMARY

[0005] The utility model discloses a battery pack with insulating plate. The insulating plate of the battery pack with insulating plate is located in the middle of two single cells, and the front and back surfaces do not directly contact with the connecting piece. The middle part is kept away, becoming a structure with an opening. The problem of poor flatness caused by the positive and negative poles of the single cell being higher than the end surface of the single cell is avoided. The two side surfaces directly contact with the planar part of the edge part of the single cell. Since the flatness of the contact part is good, the straightness of the assembled battery pack is high. The front and back surfaces of the insulating plate of the utility model have non-dry adhesives. The two side surfaces directly contact with the planar part of the edge part of the single cell. Since the flatness of the contact part is good, the straightness of the assembled battery pack is high. Since the adhesion is more sufficient, the appearance and size of the battery pack have been greatly improved in stability.

[0006] The utility model discloses a battery pack with insulating plate. The insulating plate of the battery pack with insulating plate is located in the middle of two single cells, and the front and back surfaces do not directly contact with the connecting piece. The middle part is kept away, becoming a structure with an opening. The problem of poor flatness caused by the positive and negative poles of the single cell being higher than the end surface of the single cell is avoided. The two side surfaces directly contact with the planar part of the edge part of the single cell. Since the flatness of the contact part is good, the straightness of the assembled battery pack is high. The front and back surfaces of the insulating plate of the utility model have non-dry adhesives. The two side surfaces directly contact with the planar part of the edge part of the single cell. Since the flatness of the contact part is good, the straightness of the assembled battery pack is high. Since the adhesion is more sufficient, the appearance and size of the battery pack have been greatly improved in stability.

[0007] (1), a battery pack with insulating plate, it is characterized in that, it has battery pack, connecting piece and insulating plate, the insulating plate is double ring structure, the double ring structure's double ring has opening respectively, the two surfaces of the insulating plate have non-dry adhesive and are pasted in the edge part of the multiple single cells of battery pack, the insulating plate does not directly contact with the positive pole or negative pole of single cell, the battery pack is connected by multiple single cells in series combination mode.

[0008] (2), according to (1) the battery pack with insulating plate, it is characterized in that, the battery pack is lithium battery pack or nickel hydrogen battery pack.

[0009] (3), according to (1) the battery pack with insulating plate, it is characterized in that, the connecting piece passes through the insulating plate and is connected with the positive pole or negative pole of single cell in the mode of not contacting the double ring structure.

[0010] (4), according to (1) the battery pack with insulating plate, it is characterized in that, the radius of the ring in the double ring structure is same with each other.

[0011] (5), according to (1) the battery pack with insulating plate, it is characterized in that, the opening size of the ring in the double ring structure is same with each other.

[0012] (6), according to (1) the battery pack with insulating plate, it is characterized in that, the radius of the ring in the double ring structure is different with each other.

[0013] (7), according to (1) the battery pack with insulating plate, it is characterized in that, the insulating plate is single insulating sheet.

[0014] (8), the battery pack with the insulating plate according to (1), characterized by, the insulating plate is laminated and pasted by multiple insulating sheets.

[0015] Practical new effect

[0016] The utility model discloses a battery pack with insulating plate can be provided. The insulating plate of the battery pack with insulating plate of the utility model is located in the middle of two single batteries, and the opposite sides do not directly contact with the connecting sheet, and the middle part is kept away, becomes a kind of double-ring structure with the design of opening, avoids the influence of the straightness of the L-shaped structure battery pack by the uneven head of single battery. Good straightness, high stability of appearance and size of battery pack. The shape of the outer side of single battery can be positioned, and after installation, the problem of misplacement does not occur. Accompanying drawings

[0017] Figure 1 It is the schematic diagram of the insulating plate of one embodiment of the utility model.

[0018] Figure 2 It is the top view of the battery pack with insulating plate of one embodiment of the utility model.

[0019] Figure 3 It is the side view of the battery pack with insulating plate of one embodiment of the utility model.

[0020] 100: battery pack with insulating plate

[0021] 1: battery pack

[0022] 2: insulating plate

[0023] 3: connecting sheet

[0024] 4: single battery Specific embodiment

[0025] The specific embodiment of the utility model will be described in detail below, and the described embodiment is only exemplary, and can take various forms. Moreover, the drawings disclosed in the specification are schematically illustrated in principle. That is, the size ratio on the drawing is not necessarily consistent with the actual size ratio, and the size ratio is not necessarily consistent between the drawings.

[0026] Next, the specific embodiment of the battery pack with insulating plate of the utility model will be described with reference to the drawings.

[0027] Figure 1 It is the schematic diagram of the insulating plate of one embodiment of the utility model. Figure 2 It is the top view of the battery pack with insulating plate of one embodiment of the utility model. Figure 3is a side view of a battery pack with an insulating plate according to an embodiment of the present application. A battery pack 100 with an insulating plate, characterized in that it has a battery pack 1, a connecting piece 3 and an insulating plate 2, the insulating plate 2 is a double ring structure, the double ring of the double ring structure has an opening respectively, two surfaces of the insulating plate 2 have adhesive and are attached to the edge part of a plurality of single cells 4 of the battery pack 1, the insulating plate 2 does not directly contact the positive electrode or the negative electrode of the single cell, and the battery pack 1 is connected in a series combination manner by a plurality of single cells 4.

[0028] The battery pack 1 of the present application can be a lithium battery pack, a nickel-hydrogen battery pack, or other battery packs. The single cell 5 can be pre-fabricated in different widths, lengths, thicknesses, and shapes. Preferably, the battery 5 is a 18650 type cylindrical battery, which has the characteristics of high monomer energy density, light weight, long service life, and easy assembly.

[0029] The connecting piece of the present application passes through the insulating plate without contacting the double ring structure and is connected to the positive electrode or the negative electrode of the single cell. The above-mentioned connecting piece is preferably a nickel sheet.

[0030] The insulating plate of the present application is located between two single cells, the opposite surfaces do not directly contact the conductive plate, the middle part is left open, and it becomes a double ring structure with an opening. The above-mentioned insulating plate can be a single-layer insulating plate, or it can be formed by laminating and attaching multiple insulating plates. According to different battery diameters or other structural needs of the battery, the radii of the rings in the above-mentioned double ring structure can be the same or different. According to different battery diameters or other structural needs of the battery, the sizes of the openings of the rings in the above-mentioned double ring structure can be the same or different. Preferably, the radii of the rings in the double ring structure are the same, and the sizes of the openings are different, which is more conducive to improving the flatness caused by the positive and negative electrodes of the single cell protruding above the end surface of the single cell.

[0031] According to the needs, the insulating plate can be a single insulating sheet, or it can be formed by laminating and attaching multiple insulating sheets. The insulating sheet of the present application can be NOMEX insulating paper, Kapton paper, Formex insulating paper, etc. The back of the insulating plate has adhesive and is attached to the edge part of a plurality of single cells of the battery pack.

[0032] NOMEX insulation paper is a type of aramid, collectively known as aramid. The molecular structure of this material is particularly stable, and the properties of NOMEX paper are derived from this. NOMEX insulation paper is made from two forms of aramid polymer. Fine fibrous binder particles, one form of aramid, are cut directly from the polymer under very high shear. These particles are mixed with short fibers of a certain length cut from the fiber filaments. It has a unique and appropriate balance of properties, and has been widely used for many years in transformers, electric machines, generators and other electrical equipment to improve the reliability of electrical insulation.

[0033] Kapton paper is a tight, hard, multi-layered material produced from a combination of raw kraft paper pulp and acrylic polymer. It has excellent electrical insulation properties and mechanical strength, low water absorption, and does not contain conductive particles, chemical impurities and other impurities. Its chemical purity is the reason for its excellent performance and the use temperature in air can reach 105°C. In addition, Kapton paper also has good environmental protection because its fibers can be disposed of by burning and will not pollute the environment. The characteristics of this material include good insulation, arc resistance, oil resistance, easy processing (stamping and bending), excellent mechanical strength and heat resistance, and the advantages of metal, plastic, rubber, leather and wood. Specifically, the material used by Kapton paper is made of wood pulp and cotton pulp, and the main material is cotton fiber.

[0034] Formex insulation paper is mainly made of polypropylene (PP), which meets the UL94V-0 fireproof grade, has good electrical insulation properties, low water absorption and high mechanical strength. Formex insulation paper has been widely used in the fields of electrical and electronic due to its excellent insulation performance, fireproof grade and mechanical strength.

[0035] Without the requirement of fireproof grade, paper or ordinary plastic materials can also be selected to reduce the cost of paper.

[0036] A specific example of making a battery pack is made according to the following steps.

[0037] Two cylindrical lithium batteries are connected in series by a connecting sheet. The insulation board of the utility model is used for double-sided attachment between the two lithium batteries connected in series. The obtained battery pack has good straightness in the length direction, and the appearance and size requirements can be guaranteed when subsequent sleeve processing or other assembly processes are performed.

[0038] The made insulation board is located between two lithium batteries, the front and back surfaces are not directly contacted with the guide plate, the middle part is opened, and becomes an open structure. Since the middle part is opened, the problem of poor flatness caused by the positive and negative poles of the lithium battery being higher than the end surface of the lithium battery is avoided. The front and back surfaces of the insulation board are provided with adhesive, the two side surfaces are directly contacted with the flat surface of the edge part of the lithium battery, since the flatness of the contacted part is good, the straightness of the assembled battery pack is high. In addition, since the fitting is sufficient, the stability of the appearance and size of the battery pack is greatly improved.

[0039] The above describes the preferred embodiments of the present application, but should not be limitedly interpreted as such disclosed content. Various modifications and changes are obvious to those skilled in the art in the technical field to which the present application belongs by reading the above disclosure. Therefore, the appended claims should be understood as including all modifications and changes without departing from the true spirit and scope of the present application.

[0040] Industrial availability

[0041] The battery pack with the insulation board can be provided by the present application. Therefore, the battery pack with the insulation board of the present application can be used as a power supply of various devices, such as a power supply, a backup power supply, etc. of electric tools, electric toys, electric bicycles, electric vehicles, electric skateboards, cordless phones, etc.

Claims

1. A battery pack with an insulating plate, characterized by, The battery pack has a battery group, a connecting piece and an insulating plate, the insulating plate is a double ring structure, the double rings of the double ring structure have openings respectively, the two surfaces of the insulating plate have non-dry adhesives and are attached to the edge portions of a plurality of single cells of the battery group, the insulating plate does not directly contact the positive or negative poles of the single cells, and the battery group is connected by the single cells in a series combination.

2. The battery with an insulating plate according to claim 1, characterized by, The battery pack is a lithium battery pack or a nickel-hydrogen battery pack.

3. The battery with an insulating plate according to claim 1, characterized by, The connecting piece passes through the insulating plate without contacting the double ring structure and is connected to the positive or negative pole of the single cell.

4. The battery with an insulating plate according to claim 1, wherein The radii of the rings in the double ring structure are the same as each other.

5. The battery with an insulating plate according to claim 1, wherein The opening sizes of the rings in the double ring structure are the same as each other.

6. The battery with an insulating plate according to claim 1, wherein The radii of the rings in the double ring structure are different from each other.

7. The battery with an insulating plate according to claim 1, wherein The insulating plate is a single insulating sheet.

8. The battery with an insulating plate according to claim 1, wherein The insulating plate is laminated and attached by a plurality of insulating sheets.

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