Lithium ion battery module

Abstract

The utility model relates to a lithium ion battery module, which belongs to the technical field of batteries, and comprises a lower shell, a heating sheet, a temperature probe and battery cells, a battery cavity is arranged in the lower shell, a plurality of battery cells are sequentially arranged in the battery cavity, a positive pole lug and a negative pole lug are arranged on each battery cell, an electrical fixing plate is arranged on the lower shell, and the heating sheet is arranged on the electrical fixing plate. A plurality of groups of metal sheets are arranged in the electrical fixing plate, the positive pole lug and the negative pole lug are respectively connected with the metal sheets, the upper shell is arranged on the lower shell, and the heating sheet is arranged between the battery cell and the lower shell. The lithium ion battery module disclosed by the utility model is excellent in performance, on one hand, the battery cell can directly enter the module, the cost is reduced, the production and the maintenance are convenient, and the space utilization rate and the process efficiency are improved, and on the other hand, the problem of heating the lithium ion battery module in a low-temperature environment is solved, and the limitation of a use environment is solved to the greatest extent.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a lithium-ion battery module. Background Art

[0002] With the guidance and promotion of new energy policies at home and abroad, the technological innovation of lithium batteries in the directions of energy storage, communication, etc. has developed rapidly. The technical research on lithium batteries has been gradually deepened, the industrialization of lithium-ion batteries has increased rapidly, and the requirements of lithium battery application clients have become higher and higher. In the application of lithium batteries, the consistency control of battery cells is the key technology for battery cell grouping, so it has received key attention from clients. Due to the limitation of its structure, the traditional square lithium battery module has poor uniformity of heat reception of its single battery cells, resulting in temperature differences between the battery cells, thus affecting the consistency of the lithium battery module, further affecting the cycle life of the lithium battery pack system. Moreover, the traditional square lithium battery module has a large overall weight, scattered wiring harnesses, poor structural stability, and low efficiency of process assembly.

[0003] In summary, how to solve the problem of poor uniformity of heat reception of each single battery cell in the existing square lithium battery module, ensure the consistency, overall light weight, simple and compact structure of the square lithium battery module, extend the cycle life of the lithium battery pack system, and improve the efficiency of process assembly are the problems that need to be solved urgently by those skilled in the art at present. Content of the Utility Model

[0004] The utility model aims to solve the above technical problems and provides a lithium-ion battery module.

[0005] To solve the above technical problems, the technical solution provided by the utility model is as follows:

[0006] A lithium-ion battery module includes a lower housing, a heating sheet, a temperature probe, and battery cells. A battery cavity is arranged in the lower housing, and multiple battery cells are sequentially installed in the battery cavity. A positive electrode tab and a negative electrode tab are installed on each battery cell. An electrical fixing plate is installed on the lower housing, and multiple groups of metal sheets are installed in the electrical fixing plate. The positive electrode tab and the negative electrode tab are respectively connected to the metal sheets. An upper housing is installed on the lower housing, and the heating sheet is installed between the battery cells and the lower housing.

[0007] Preferably, the positive electrode tab and the negative electrode tab are connected to the metal sheets by laser welding to realize the series / parallel connection of multiple battery cells, forming the total positive electrode and the total negative electrode of the module.

[0008] Preferably, the total positive electrode and the total negative electrode are led out externally by bolts.

[0009] Preferably, a battery cell cover plate is installed on the battery cell.

[0010] Preferably, a battery protection board is installed between the electrical fixing plate and the upper housing.

[0011] Preferably, an installation hole for installing a temperature probe is provided on the battery protection board, and the temperature probe detects the temperature of the battery protection board and controls the heating sheet to work.

[0012] Preferably, a slide rail is installed on the outer side of the lower housing.

[0013] After adopting the above structure, the present utility model has the following advantages:

[0014] The lithium-ion battery module of the present utility model has excellent performance. On the one hand, the battery cells can be directly put into the module, reducing costs, facilitating production and maintenance, and improving space utilization rate and process efficiency. On the other hand, it solves the problem of heating the lithium battery module in low-temperature environments, and maximally solves the limitations of the use environment.

[0015] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present utility model will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is an exploded view of the present utility model;

[0018] Figure 2 is the present utility model Figure 1 side view;

[0019] Figure 3 is a structural schematic diagram of the battery cell of the present utility model.

[0020] As shown in the figure: 1. Lower housing; 2. Heating sheet; 3. Temperature probe; 4. Battery cell; 5. Positive electrode tab; 6. Negative electrode tab; 7. Electrical fixing plate; 8. Metal sheet; 9. Slide rail; 10. Upper housing; 11. Battery cell cover plate; 12. Battery protection board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0022] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0023] The following further elaborates on the present utility model in conjunction with the full text.

[0024] Combined with the attached Figures 1 - 3 , a lithium-ion battery module includes a lower housing 1, a heating sheet 2, a temperature probe 3, and battery cells 4. A battery cavity is provided inside the lower housing 1. A plurality of battery cells 4 are sequentially installed in the battery cavity. A positive electrode tab 5 and a negative electrode tab 6 are installed on each of the battery cells 4. An electrical fixing plate 7 is installed on the lower housing 1. Multiple groups of metal sheets 8 are installed inside the electrical fixing plate 7. The positive electrode tab 5 and the negative electrode tab 6 are respectively connected to the metal sheets 8. An upper housing 10 is installed on the lower housing 1. The heating sheet 2 is installed between the battery cells 4 and the lower housing 1.

[0025] Specifically, as Figure 3 shown, the form of the battery cells 4 is not limited to the wound core, stacked core, and soft-pack battery cell forms.

[0026] When the present utility model is specifically implemented, as Figure 1 and Figure 2 shown, the battery cells 4 are directly inserted into the module, and a core body cover plate 11 is installed. The positive electrode tab 5 and the negative electrode tab 6 are provided on one side of the battery cells 4. The positive electrode tabs 5 and the negative electrode tabs 6 between multiple battery cells 4 are laser welded to the metal sheets 8 on the electrical fixing plate 7 to achieve the series / parallel connection of the core body 4, and finally form the total positive and negative electrodes of the module.

[0027] Then, it is led out externally by means of bolts.

[0028] The positive electrode tab 5 and the negative electrode tab 6 are connected to the metal sheet 8 by laser welding to achieve the series / parallel connection of multiple battery cells 4, and form the total positive electrode and the total negative electrode of the module.

[0029] The total positive electrode and the total negative electrode are led out externally by means of bolts.

[0030] The battery cell cover plate 11 is installed on the battery cell 4.

[0031] The battery protection board 12 is installed between the electrical fixing plate 7 and the upper housing 10.

[0032] When the present utility model is specifically implemented, as Figure 1 and Figure 2 shown, a temperature probe 3 is provided inside the module, and heating modules (heating sheets 2) are provided on both sides. The battery protection board 12 detects through the temperature probe 3 and controls the heating modules, so as to realize automatic heating of the module according to the ambient temperature, and solve the problem of using lithium batteries in alpine regions. The temperature probe 3 and the heating sheet 2 are electrically connected, and both are existing technologies, so no further description will be given here. An installation hole for installing the temperature probe 3 is opened on the battery protection board 12, and the temperature probe 3 detects the temperature of the battery protection board 12 and controls the heating sheet 2 to work.

[0033] A slide rail 9 is installed on the outer side of the lower housing 1. The lower housing 1 outside the module is provided with double slide rails and slide ways, and the slide ways are provided with anti-retreat buckles, which can be spliced and combined to realize the connection and fixation of the multi-module structure.

[0034] For the current lithium-ion battery modules, when multiple modules are installed, an external installation housing needs to be added, and after being integrated, it is output externally. The module housing of the present utility model adopts an injection-molded single shell formed by PC, PP, and ABS, without an external installation housing, and can be used alone by splicing and combining, which is convenient and fast, and significantly improves the energy density of the module.

[0035] Embodiment 1:

[0036] The battery cell 4 is directly inserted into the module, and the core body cover plate 11 is installed. The positive electrode tab 5 and the negative electrode tab 6 are provided on one side of the battery cell 4. The positive electrode tabs 5 and the negative electrode tabs 6 between multiple battery cells 4 are laser welded to the metal sheet 8 of the electrical fixing plate 7 to realize the series / parallel connection of the core body 4, and finally form the total positive and negative electrodes of the module. The total positive and negative electrodes are led out externally by bolts, and are spliced through the slide rails to form a module. The modules are spliced and combined through the slide ways to realize the connection of multiple modules.

[0037] Embodiment 2:

[0038] Compared with Embodiment 1, a temperature probe 3 and heating sheets 2 are added. A temperature probe 3 is provided inside the module, and heating modules (heating sheets 2) are provided on both sides. The battery protection board 12 detects through the temperature probe 3 and controls the heating modules, so as to realize automatic heating of the module according to the ambient temperature, and solve the problem of using lithium batteries in alpine regions. The temperature probe 3 and the heating sheet 2 are electrically connected. An installation hole for installing the temperature probe 3 is opened on the battery protection board 12, and the temperature probe 3 detects the temperature of the battery protection board 12 and controls the heating sheet 2 to work.

[0039] The above description is made on the present utility model and its implementation manners. Such description is not restrictive. What is shown throughout the text is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, design without creativity a structural manner and embodiments similar to the technical solution, they shall fall within the protection scope of the present utility model.

Claims

1. A lithium-ion battery module, characterized in that: The invention comprises a lower shell (1), a heating plate (2), a temperature probe (3) and a battery cell (4); a battery cavity is arranged in the lower shell (1); a plurality of battery cells (4) are sequentially installed in the battery cavity; a positive electrode tab (5) and a negative electrode tab (6) are installed on each of the battery cells (4); an electrical fixing plate (7) is installed on the lower shell (1); a plurality of groups of metal sheets (8) are installed in the electrical fixing plate (7); the positive electrode tab (5) and the negative electrode tab (6) are respectively connected to the metal sheets (8); an upper shell (10) is installed on the lower shell (1); and the heating plate (2) is installed between the battery cell (4) and the lower shell (1).

2. A lithium-ion battery module according to claim 1, characterized in that: The positive electrode tab (5) and the negative electrode tab (6) are connected to the metal sheet (8) by laser welding, thereby realizing series / parallel connection of a plurality of the battery cells (4) to form a total positive electrode and a total negative electrode of the module.

3. A lithium-ion battery module according to claim 2, characterized in that: The total positive electrode and the total negative electrode are led outward by means of bolts.

4. A lithium-ion battery module according to claim 1, characterized in that: A cell cover plate (11) is installed on the cell (4).

5. A lithium-ion battery module according to claim 1, characterized in that: A battery protection plate (12) is installed between the electrical fixing plate (7) and the upper shell (10).

6. A lithium-ion battery module according to claim 5, characterized in that: The battery protection plate (12) is provided with a mounting hole for mounting a temperature probe (3), and the temperature probe detects the temperature of the battery protection plate (12) and controls the operation of the heating plate (2).

7. A lithium-ion battery module according to claim 1, characterized in that: A slide rail (9) is installed on the outer side of the lower shell (1).

Images