Power battery module and shell attaching installation structure

Abstract

The utility model discloses a power battery module and shell attaching installation structure which comprises a protective shell used for protecting and wrapping a battery pack, a step groove used for installing a circuit board is formed in the side of the protective shell, the outer portion of the protective shell is sleeved with a shell, and the upper side of the shell is an opening side used for being connected with the whole protective shell in a sleeved mode. The position, corresponding to the opening side, of the shell is sealed through a sealing cover, positioning devices are arranged at the bottom of the protective shell and the bottom of the shell, a plurality of elastic components are fixed to the other side, opposite to the step groove, of the protective shell, and the protective shell abuts against the inner side wall of the shell through the elastic components. On one hand, the positioning device is used for positioning, and on the other hand, the elastic component is used for enabling the protective shell and the shell to be in elastic contact, so that the protective shell and the inner side wall of the shell are attached more tightly under the condition that the elastic component slightly deforms and are not easy to shake under external impact, and the stability of the internal protective shell and the battery pack is improved; and the internal wiring stability is further protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy batteries, and in particular relates to a power battery module and a shell abutment installation structure. Background Art

[0002] New energy batteries are mainly lithium iron phosphate batteries, which are lithium-ion batteries that use lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. They are wrapped in an aluminum shell and made into a block structure with a length, width and thickness of about 15*12*3cm. As a power battery component, multiple block batteries are required to work in coordination to meet the power and voltage requirements.

[0003] Two-wheeled riding electric vehicles are usually equipped with fixed rechargeable batteries. When the vehicle needs to be used for a long time, the downtime caused by charging is very inconvenient. For example, the takeaway industry requires uninterrupted use of electric vehicles. In order to avoid waiting for charging time, detachable and rechargeable new energy batteries are very suitable. The battery is composed of multiple block batteries arranged, fixed by glue or tape, and then fixed by a protective shell as a whole, forming an integrated battery pack for power supply to ensure voltage and power. The protective shell is a regular structure, and the internal cavity is used to store and protect the battery blocks. There are also step grooves on the outside, which are used to accommodate the balancing circuit board and distribution cables on the one hand, and the extra space can dissipate heat on the other hand. When the overall battery pack is put into use, it will also be connected to an outer shell, which is used for waterproofing, anti-collision and other protective functions. The upper side of the outer shell is an open side, which is used to connect the overall battery pack. A resin sealing cover is installed at the position of the opening side, and the sealing cover is integrated with charging and discharging interfaces and handles.

[0004] When installing the battery pack, it is directly plugged into the shell. The outer protective shell of the battery pack slides along the inner wall of the shell and a certain space needs to be reserved. At the same time, the protective shell itself has a step groove, which makes it difficult to ensure that the battery pack fits tightly into the shell. When the power battery is used for a long time, the battery pack is easy to shake in the shell under bumpy conditions, causing the terminal to loosen. Therefore, the utility model mainly adds a stabilizing device between the protective shell and the shell to ensure that the battery pack is smoothly installed in the shell, and at the same time ensure that the battery pack does not shake when the shell vibrates. Utility Model Content

[0005] The purpose of the utility model is to provide a power battery module and shell close mounting structure, mainly between the protective shell and the shell to add a stabilizing device to ensure that the battery pack is smoothly installed on the shell, while ensuring that the battery pack does not shake when the shell vibrates.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] A power battery module and shell close mounting structure, comprising a protective shell for protecting and wrapping a battery pack, the protective shell is a regular structure, the side of which has a step groove for mounting a circuit board, the outer shell is sleeved with the outer shell, the upper side of the outer shell is an open side, which is used to sleeve the protective shell as a whole, and the position of the outer shell corresponding to the open side is sealed by a sealing cover;

[0008] The bottom of the protective shell and the bottom of the outer shell are provided with positioning devices;

[0009] A plurality of elastic components are fixed to the other side of the protective shell relative to the step groove, and the protective shell abuts against the inner wall of the shell through the elastic components.

[0010] Furthermore, an elastic component is installed on the corresponding upper side of the protective shell for elastically abutting against the sealing cover.

[0011] Furthermore, the elastic component is a strip-like structure with symmetrical bends on both sides, the corresponding end sides are fixed to the protective shell, and the center is a horizontal structure for contacting the inner wall of the shell. The corresponding bend of the elastic component is an S-shaped bend with obvious peaks and troughs.

[0012] Furthermore, the elastic component has a flat mounting portion at its end for overlapping and fixing with the side wall of the protective shell. A sponge cushion layer is pasted on the corresponding abutting side of the elastic component.

[0013] Furthermore, the positioning device includes a positioning groove opened at the bottom of the protective shell, including a positioning column fixed to the bottom of the shell, and the positioning groove is an open notch structure.

[0014] Furthermore, the bottom of the protective shell has a horizontally extending edge, the positioning groove is opened on the extending edge, the lower end of the positioning column vertically fixes the bottom of the shell, and the upper end has a threaded portion for reinforcement through a nut.

[0015] The utility model has the following beneficial effects: due to the extra space formed by the step groove and the extra gap reserved for the outer shell sleeve, this part of the space can easily cause the protective shell to shake. To solve this problem, on the one hand, a positioning device is used for positioning, and on the other hand, an elastic component is used to make elastic contact between the protective shell and the outer shell. Under the condition that the elastic component is slightly deformed, the protective shell and the inner wall of the outer shell are more closely attached and are not easy to shake under external impact, thereby improving the stability of the internal protective shell and the battery pack, and further protecting the stability of the internal wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0017] Figure 1: Schematic diagram of the disassembly structure of the utility model.

[0018] Figure 2 : Schematic diagram of the installation structure of the elastic component of the utility model.

[0019] Figure 3 : Schematic diagram of the structure of the elastic component of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: protective shell 1 , outer shell 2 , sealing cover 3 , elastic component 4 , sponge cushion layer 41 , positioning groove 12 , positioning column 21 , extension edge 11 . DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] like Figure 1-3 As shown: a power battery module and shell close installation structure, including a protective shell 1 for protecting and wrapping the battery pack, the protective shell 1 is a regular structure, the whole is a cubic structure, with obvious corners, the protective shell is a metal shell, one side is an open side, used to install the battery block, multiple battery blocks are neatly arranged and installed in the protective shell, and the open side is fixed by fasteners to prevent falling off. The side has a step groove for installing the circuit board, which is a part of the protective shell as a whole. When it is sleeved on the shell, a cavity is formed between the shell and the shell for routing and installing the circuit board, such as a battery equalizer, etc. This part of the space is also used for heat dissipation. The protective shell 1 is sleeved with a shell 2 on the outside, and the upper side of the shell 2 is an open side for sleeved on the protective shell 1 as a whole. The position of the shell 2 corresponding to the open side is sealed by a sealing cover 3; the sealing cover is made of resin casting and is equipped with a handle and a charging and discharging interface. The side of the sealing cover is engaged with the upper open side of the shell and fixed by bolts. The principle of the lithium battery equalizer is to monitor the voltage and current of each battery cell and perform dynamic equalization control according to the state of different cells to achieve the effect of battery capacity balancing.

[0023] The bottom of the protective shell 1 and the bottom of the outer shell 2 are provided with positioning devices, which are used to accurately position the overall structure of the protective shell.

[0024] A plurality of elastic components 4 are fixed to the other side of the protective shell 1 relative to the step groove, and the protective shell 1 contacts the inner wall of the outer shell 2 through the elastic components 4. Due to the extra space formed by the step groove and the extra gap reserved for the outer shell sleeve, this part of the space is easy to cause the protective shell to shake. To solve this problem, on the one hand, the positioning device is used for positioning, and on the other hand, the elastic components are used to make the protective shell and the outer shell contact elastically. Under the condition that the elastic components are slightly deformed, the protective shell and the inner wall of the outer shell are more closely attached, and it is not easy to shake under external impact, thereby improving the stability of the internal protective shell and the battery pack, and further protecting the stability of the internal wiring.

[0025] like Figure 2 As shown: an elastic component 4 is installed on the corresponding upper side of the protective shell 1 for elastically abutting against the sealing cover 3.

[0026] like Figure 3 As shown: the elastic component 4 is a strip-like structure, with two symmetrical bends, the corresponding ends are fixed to the protective shell 1, and the center is a horizontal structure for contacting the inner wall of the shell 2. The corresponding bend of the elastic component 4 is an S-shaped bend with obvious crests and troughs. The elastic component is a rectangular steel plate with toughness, with two bends on both sides, fixed ends, and the center is used to resist the shell. The corresponding S-shaped bend can shrink and deform under the force state in the horizontal position, and at the same time produce a reverse elastic force.

[0027] The elastic component 4 has a flat mounting portion at its end, which is used to overlap and fix with the side wall of the protective shell 1. To improve the stability of the contact between the elastic component and the protective shell, the fixing method can be to fix by opening a hole or by welding. A sponge pad 41 is attached to the corresponding side of the elastic component 4 to reduce friction and plug resistance.

[0028] like Figure 1 As shown: the positioning device includes a positioning groove 12 opened at the bottom of the protective shell 1, and a positioning column 21 fixed to the bottom of the shell 2. The positioning groove 12 is an open notch structure. Positioning is performed by the limiting effect of the positioning column and the positioning groove. At the same time, the positioning column has a movable space to move along the length direction of the positioning groove, which is convenient for the installation of the elastic component.

[0029] The bottom of the protective shell 1 has a horizontal extension edge 11, and a positioning groove 12 is provided on the extension edge 11. The lower end of the positioning column 21 vertically fixes the bottom of the shell 2, and the upper end has a threaded portion for reinforcement by a nut.

[0030] This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A power battery module and housing close-fitting installation structure, characterized in that: The invention comprises a protective shell (1) for protecting and wrapping a battery pack, the protective shell (1) being of a regular structure, with a step groove on the side for mounting a circuit board, the protective shell (1) being sleeved with an outer shell (2) on the outside, the upper side of the outer shell (2) being an open side for sleeved with the protective shell (1) as a whole, and the position of the outer shell (2) corresponding to the open side being sealed by a sealing cover (3); The bottom of the protective shell (1) and the bottom of the outer shell (2) are provided with positioning devices; A plurality of elastic components (4) are fixed to the other side of the protective shell (1) relative to the step groove, and the protective shell (1) abuts against the inner wall of the outer shell (2) through the elastic components (4).

2. According to claim 1, a power battery module and housing abutment mounting structure, characterized in that: An elastic component (4) is installed on the corresponding upper side of the protective shell (1) for elastically abutting against the sealing cover (3).

3. A power battery module and housing abutment mounting structure according to claim 1 or 2, characterized in that: The elastic component (4) is a strip-shaped structure, with two sides symmetrically bent, the corresponding end sides are fixed to the protective shell (1), and the center is a horizontal structure for contacting the inner wall of the outer shell (2). The corresponding bending part of the elastic component (4) is an S-shaped bend with obvious crest and trough structures.

4. According to claim 3, a power battery module and housing abutment mounting structure, characterized in that: The elastic component (4) has a planar mounting portion on its end side, which is used to overlap with and be fixed to the side wall of the protective shell (1).

5. The power battery module and housing abutment mounting structure according to claim 4, characterized in that: A sponge cushion layer (41) is adhered to the corresponding abutting side of the elastic component (4).

6. The power battery module and housing abutment mounting structure according to claim 1, characterized in that: The positioning device comprises a positioning groove (12) opened at the bottom of the protective shell (1), and comprises a positioning column (21) fixed to the bottom of the outer shell (2); the positioning groove (12) is an open notch structure.

7. The power battery module and housing abutment mounting structure according to claim 6, characterized in that: The bottom of the protective shell (1) has a horizontally extending edge (11), the positioning groove (12) is arranged on the extending edge (11), the lower end of the positioning column (21) is vertically fixed to the bottom of the outer shell (2), and the upper end has a threaded portion for reinforcement via a nut.

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