Energy storage battery

Abstract

A lithium battery module is installed in a shell of a lead storage battery, the energy storage battery comprises a lithium battery pack, a BMS assembly and an elastic fixing block, the lithium battery pack, the BMS assembly and the elastic fixing block are installed in the shell and connected in series, the voltage of the lithium battery pack connected in series is matched with the rated voltage of the lead storage battery, and the BMS assembly is arranged above the lithium battery pack; the shell comprises a top cover and a shell body, and the top cover is provided with a positive electrode wiring port and a negative electrode wiring port; a positive terminal of the lithium battery pack is electrically connected with the positive wiring port, and the positive terminal is electrically connected with the negative wiring port; the bottom of the lithium battery pack is bonded with the bottom wall of the shell, gaps are formed between the lithium battery pack and the side wall of the shell and between the lithium battery pack and the top cover, and the elastic fixing blocks are arranged in the gaps in an interference mode. According to the utility model, the lithium battery pack is arranged in the traditional lead-acid shell, and safe and reliable protection is provided for the lithium battery pack.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery, more specifically, relate to a kind of energy storage battery. BACKGROUND

[0002] With the demand of energy development, the short cycle life, low recycling value, environmental pollution and other shortcomings of traditional lead-acid battery, which has not met the market demand. The energy density of lithium battery is usually much higher than that of lead-acid battery, which means that lithium battery can store more energy in the same volume or weight. Lithium battery is lighter than lead-acid battery, and its cycle life is usually longer than that of lead-acid battery, which makes it more economical in long-term use.

[0003] Especially in electric vehicles, energy storage systems and portable power supply equipment, lead-acid batteries need to be upgraded to lithium batteries. But in the upgrading process, make sure that the new lithium battery pack matches the voltage and capacity of the original system, otherwise it may cause the electrical equipment to work abnormally. The installation of lithium battery may involve complex wiring and installation process, and improper installation may pose a safety hazard. And the original installation shell space of lead-acid battery is fixed, how to install lithium battery pack in the original shell is also a problem to be solved.

[0004] Therefore, it is necessary to provide a kind of energy storage battery for installing lithium battery pack in traditional lead-acid shell. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of energy storage battery, overcome the above-mentioned defects in the prior art.

[0006] The technical scheme for realizing the utility model aims at providing a kind of energy storage battery, overcome the above-mentioned defects in the prior art.

[0007] As a preferred embodiment, the elastic fixing block is an EVA elastic fixing block.

[0008] As a preferred implementation, the lithium battery pack comprises a plurality of lithium batteries arranged in sequence, two end plates and a steel band; the two end plates are respectively arranged at two ends of the plurality of lithium batteries, and the steel band is not less than one and is sleeved on the plurality of lithium batteries and the two end plates.

[0009] As a preferred implementation, the two end plates are provided with hand carrying parts which are higher than the lithium batteries.

[0010] As a preferred implementation, the steel band is provided with two steel bands, and the two end plates are provided with two grooves in cooperation for limiting the steel band.

[0011] As a preferred implementation, the outer layer of the steel band is covered with an insulating sleeve.

[0012] As a preferred implementation, two elastic fixing strips are bonded between adjacent lithium batteries.

[0013] As a preferred implementation, the lithium battery pack and the BMS assembly are provided with heat insulation blocks.

[0014] With the above technical scheme, the utility model has the following beneficial effects:

[0015] (1) The utility model makes use of the original lead-acid battery shell to install and upgrade the lithium battery module. Because the energy density of the lithium battery is usually much higher than that of the lead-acid battery, the lithium battery can store more electric energy. The cycle life of the lithium battery is usually longer than that of the lead-acid battery, which makes it more economical in long-term use. By setting a proper BMS battery management system, the battery can be protected from overcharging, overdischarging, overheating and other problems. By connecting the lithium batteries in series to match the voltage of the original lead-acid battery, direct replacement can be achieved. The lithium battery pack is fixed in the middle of the shell by the elastic fixing block, which plays a fixing and buffering role for the lithium battery pack and prolongs the service life.

[0016] (2) The utility model is a fixed block made of EVA (ethylene-vinyl acetate copolymer material), which is a synthetic material with excellent elasticity and wear resistance and plays a role of shock absorption, anti-skid or buffering.

[0017] (3) The lithium battery pack of the utility model is connected by a steel band, which is convenient to assemble, reliable in structure, flexible in assembly and can achieve the required output voltage.

[0018] (4) The utility model adds a hand carrying part to the end plate, which facilitates manual handling of the lithium battery pack into the shell, making the assembly of the lithium battery pack and the fixing block more convenient and improving the assembly efficiency.

[0019] (5) The utility model discloses a steel band is provided with two, evenly distributed setting makes the stress of lithium battery more evenly, and the end plate sets the recess, prevents the up and down displacement of steel band.

[0020] (6) The utility model discloses a steel band outer layer covers insulating sleeve, strengthens the insulation withstand voltage performance of electric core.

[0021] (7) The utility model discloses a lithium battery between bonding has two elastic fixed strips, effectively buffers the collision between lithium battery, and can make the stress between lithium battery even, prolongs the service life of battery.

[0022] (8) The utility model discloses a heat insulation block avoids the heat transfer of BMS assembly to lithium battery group, plays the role of heat resistance, and when one of two is out of control, can also block well, prevents the spread of out of control, makes this storage battery more safe. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further detailed, wherein

[0024] Figure 1 It is a kind of stereogram of energy storage battery.

[0025] Figure 2 It is an explosion diagram of energy storage battery.

[0026] Figure 3 It is the stereogram of lithium battery group and BMS assembly.

[0027] Figure 4 It is the elastic fixed strip connection diagram of lithium battery group.

[0028] Figure 5 It is the stereogram of end plate.

[0029] The label in drawing is: 1, shell, 1-1, top cap, 1-1-1, positive terminal, 1-1-2, negative terminal, 1-2, shell body;2, lithium battery group, 2-1, lithium battery, 2-2, end plate, 2-3, steel band;3, BMS assembly;4, elastic fixed block;5, elastic fixed strip;6, heat insulation block. DETAILED DESCRIPTION

[0030] In order to better understand the above technical solutions, the above technical solutions will be explained in detail in the following by combining with the drawings of the specification and specific implementation.

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0033] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The present application will be further described below in combination with the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and cannot limit the protection scope of the present application.

[0036] (Embodiment)

[0037] With the demand of energy development, the traditional lead-acid storage battery has the disadvantages of short cycle life, low recycling value, and serious environmental pollution, which cannot meet the market demand. The embodiment is a kind of energy storage battery, which installs lithium battery pack in the traditional lead-acid shell, and provides safe and reliable protection for the lithium battery pack.

[0038] See Figure 1 and Figure 2 An energy storage battery, lithium battery modules are installed in the shell 1 of the lead-acid battery, including lithium battery pack 2, BMS assembly 3 and elastic fixing block 4 installed inside the shell 1 in series. The shell 1 includes a top cover 1-1 and a shell 1-2, and the top cover 1-1 is provided with a positive terminal 1-1-1 and a negative terminal 1-1-2.

[0039] The rated voltage of the lead-acid battery is 12V, and four 3V lithium batteries 2-1 are selected in series. The lithium battery pack 2 includes four lithium batteries 2-1 arranged in sequence, two end plates 2-2 and two steel belts 2-3; two end plates 2-2 are respectively arranged at both ends of the four lithium batteries 2-1, and two steel belts 2-3 are sleeved on the four lithium batteries 2-1 and the two end plates 2-2. The lithium battery pack is connected through the steel belt, which is convenient to assemble, has a firm structure, and can be flexibly assembled to achieve the required output voltage.

[0040] The two end plates 2-2 are provided with a hand-held part higher than the lithium battery 2-1, and the two end plates 2-2 are cooperatively provided with two grooves for limiting the steel belt. The hand-held part is convenient for manually carrying the lithium battery pack into the shell, so that the assembly of the lithium battery pack and the fixing block is more convenient, and the assembly efficiency is improved. The end plate is provided with a groove to prevent the upward and downward displacement of the steel belt. The outer layer of the steel belt 2-3 is covered with an insulating sleeve to enhance the insulation and voltage resistance performance of the battery cell.

[0041] The BMS assembly 3 is arranged above the lithium battery pack 2, and the BMS assembly 3 is an existing electronic control system for monitoring and managing the performance of the battery pack, which can measure the voltage of the lithium battery pack 2 to ensure that all lithium battery packs 2 work within a safe range; It can also monitor the temperature of the battery to prevent overheating or overcooling and prolong the service life of the battery. Through real-time monitoring and control, the BMS assembly 3 can prevent potential dangers such as battery overheating and short circuit, and improve the overall safety of the system.

[0042] The positive terminal of the lithium battery pack 2 is electrically connected with the positive terminal port 1-1-1, and the positive terminal is electrically connected with the negative terminal port 1-1-2; the bottom of the lithium battery pack 2 is bonded with the bottom wall of the shell 1, gaps are arranged between the lithium battery pack 2 and the side wall of the shell 1-2 and the top cover 1-1, and the elastic fixing block 4 is arranged in the gap in an interference manner, so that the impact and displacement of the lithium battery pack 2 can be effectively prevented when the lithium battery pack 2 is carried or falls. When the lithium battery pack 2 is installed, the EVA elastic fixing blocks are bonded on the both sides of the bottom of the shell 1. The EVA elastic fixing blocks can be used to limit the lithium battery pack 2 and prevent the lithium battery pack 2 from being installed in a displacement manner, so that the pre-fixing effect is achieved. Meanwhile, the EVA elastic fixing blocks on the bottom of the shell 1 also play a cofferdam role, the glue is applied in the cofferdam area, the glue overflow is prevented, the glue is saved, and therefore, the production operation is facilitated and the material cost is reduced. The elastic fixing block 4 is an EVA elastic fixing block, which is a fixed block-shaped object made of ethylene-vinyl acetate copolymer material, is a synthetic material with excellent elasticity and wear resistance, and plays a role of shock absorption, anti-skid or buffering.

[0043] Further, two elastic fixing strips 5 are bonded between adjacent lithium batteries 2-1, and the lithium battery pack 2 and the BMS assembly 3 are provided with a heat insulation block 6. The elastic fixing strip 5 is selected from an EVA elastic sheet, which can effectively buffer the collision between the lithium batteries, make the lithium batteries bear force uniformly, and prolong the service life of the lithium batteries. The heat insulation block can avoid the heat of the BMS assembly from being transmitted to the lithium battery pack, plays a role of heat resistance, and can also well block the spread of the out-of-control lithium batteries, so that the storage battery is safer.

[0044] The above-described specific embodiments further specifically describe the purpose, technical scheme and advantages of the utility model, and it should be understood that the above-described specific embodiments are only specific embodiments of the utility model and are not used to limit the utility model, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An energy storage battery, in which a lithium battery module is installed in a housing (1) of a lead storage battery, characterized by: The application relates to a lithium-lead storage battery, which comprises a lithium battery pack (2), a BMS assembly (3) and an elastic fixing block (4) installed in series inside a shell (1), the voltage of the lithium battery pack (2) matches the rated voltage of a lead storage battery, the BMS assembly (3) is arranged above the lithium battery pack (2); the shell (1) comprises a top cover (1-1) and a shell body (1-2), the top cover (1-1) is provided with a positive electrode wiring port (1-1-1) and a negative electrode wiring port (1-1-2); a positive electrode wiring post of the lithium battery pack (2) is electrically connected with the positive electrode wiring port (1-1-1), and a positive electrode wiring post is electrically connected with the negative electrode wiring port (1-1-2); the bottom of the lithium battery pack (2) is bonded with the bottom wall of the shell body (1-2), gaps are arranged between the lithium battery pack (2) and the side wall of the shell body (1-2) and the top cover (1-1), and the elastic fixing block (4) is arranged in the gaps in an interference mode.

2. An energy storage battery according to claim 1, wherein: The elastic fixing block (4) is an EVA elastic fixing block.

3. An energy storage battery according to claim 1, wherein: The lithium battery pack (2) comprises a plurality of lithium batteries (2-1) arranged in sequence, two end plates (2-2) and a steel band (2-3); the two end plates (2-2) are arranged at two ends of the plurality of lithium batteries (2-1) respectively, and the steel band (2-3) is not less than one and is sleeved on the plurality of lithium batteries (2-1) and the two end plates (2-2).

4. An energy storage battery according to claim 3, wherein: The two end plates (2-2) are provided with hand-carrying parts which are higher than the lithium batteries (2-1).

5. An energy storage battery according to claim 3, wherein: The steel band (2-3) is provided with two steel bands, and the two end plates (2-2) are provided with two grooves in cooperation for limiting the steel band (2-3).

6. An energy storage battery according to claim 3, wherein: The steel band (2-3) is covered with an insulating sleeve.

7. An energy storage battery according to claim 2, wherein: Two elastic fixing strips (5) are bonded between adjacent lithium batteries (2-1).

8. An energy storage battery according to claim 1, wherein: The lithium battery pack (2) and the BMS assembly (3) are provided with heat insulation blocks (6).

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