Compact battery system

Abstract

The utility model relates to the technical field of batteries, in particular to a compact battery system, which comprises a battery module, a thermal management system, a battery management system, an electrical system and a structural member, the battery module comprises a plurality of battery cells, an insulating isolation seat, a fixing belt and a connecting bar; the battery cells and the insulated isolation seats are arranged at intervals along the length direction of the battery module body, the battery cells and the insulated isolation seats at adjacent positions are fixed through fixing bands, the fixing bands penetrate through the insulated isolation seats, and at least part of the outer side surfaces of the battery cells are in line contact or point contact with the insulated isolation seats; according to the battery module disclosed by the utility model, the capability density of a battery system can be improved, heat accumulation in the battery module can be avoided, and the safety performance of the battery system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically to a compact battery system. Background Art

[0002] The new energy power battery system for automobiles is currently relatively mature. Generally, the battery system is composed of a battery module, a thermal management system, a battery management system (BMS), an electrical system and a structural member. Among them, the battery module is composed of multiple battery cells. In order to increase the energy density and reduce the structural members, the prior art such as the battery module of Chinese patent, publication number: CN214848824U, clamps the battery module body by fixing belts between two end plates, and the batteries are separated by insulating separator plates. Although it can simplify the assembly of the battery module and increase the energy density of the battery module, under the action of the fixing belts, the batteries and the insulating separator plates are in close contact, so that when the batteries are charged and discharged, heat is likely to accumulate inside the battery module, bringing potential hazards to the operation of the battery module. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a compact battery system, which can improve the energy density of the battery system while avoiding heat accumulation inside the battery module and improving the safety performance of the battery system.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: A compact battery system includes a battery module, a thermal management system, a battery management system, an electrical system and a structural member. The battery module includes multiple battery cells, insulating isolation seats, fixing belts and connection rows. The battery cells and the insulating isolation seats are arranged at intervals along the length direction of the battery module body. The battery cells and the insulating isolation seats at adjacent positions are fixed by fixing belts. Among them, the fixing belts penetrate through the insulating isolation seats, and at least part of the outer side surface of the battery cell is in line contact or point contact with the insulating isolation seat. Multiple battery cells are connected in series through connection rows.

[0005] Preferably, the insulating isolation seat includes a partition board; the two main end faces of the partition board are in a corrugated structure; the partition board is in line contact with the outer side surface of the battery cell.

[0006] Preferably, the partition board is composed of multiple heat dissipation tubes; multiple heat dissipation tubes are arranged in sequence along the height direction of the battery module body.

[0007] Preferably, at least part of the multiple heat dissipation tubes are in a hollow structure.

[0008] Preferably, square holes are formed in the partition board; the square holes are communicated with the space outside the battery module body through heat dissipation tubes.

[0009] Preferably, the insulating isolation seat further includes a support plate; the support plate is fixedly arranged at the lower end of the partition board; the battery cells at the corresponding positions are crimped with the support plate.

[0010] Preferably, the partition board is located inside the battery module body.

[0011] Preferably, at least a part of the upper end surface of the support plate coincides with the lower end surface of the battery cell.

[0012] Preferably, two fixing bands are sleeved on the outer periphery of each battery cell; the fixing bands at the corresponding positions alternately penetrate through the heat dissipation tubes.

[0013] Preferably, the fixing band is a plastic-steel band.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: by arranging an insulating isolation seat between the battery cells, the insulating isolation seat is composed of a partition board and a support plate, the main end surface of the partition board is a corrugated structure, so that the partition board is in line contact with the battery cell, the support plate holds up the battery cell, the partition board is composed of a plurality of heat dissipation tubes, and at the same time, the insulating isolation seat and the battery cell are fixed by fixing bands, the fixing bands penetrate through the heat dissipation tubes, and the battery cells are connected by connecting rows. Through these measures, the internal gap of the battery module is increased, while improving the energy density of the battery system, it can also avoid heat accumulation inside the battery module and improve the safety performance of the battery system. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the whole battery module of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the insulating isolation board of the present utility model.

[0017] In the figure: 1 battery cell, 2 insulating isolation seat, 3 fixing band, 4 connecting row, 21 partition board, 22 support plate, 23 square hole, 211 heat dissipation tube. Detailed Embodiments

[0018] The following details the specific embodiments of the present utility model with reference to the drawings, so that those skilled in the art can more clearly understand how to practice the present utility model. Although the present utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative and do not limit the scope of the present utility model.

[0019] Specific Embodiment 1: Please refer to Figure 1-2 a compact battery system, the battery system is composed of a battery module, a thermal management system, a battery management system (BMS), an electrical system and a structural member. The purpose of this application is to improve the energy density of the battery system while avoiding heat accumulation inside the battery module and improving the safety performance of the battery system. Therefore, the composition of the battery module is mainly introduced below.

[0020] The battery module has an x-direction (length direction), a y-direction (width direction), and a z-direction (height direction), and includes battery cells 1 with positive and negative electrodes, an insulating isolation seat 2, a fixing strap 3, and a connection row 4. There are multiple battery cells 1, insulating isolation seats 2, fixing straps 3, and connection rows 4. The multiple battery cells 1 and insulating isolation seats 2 are arranged at intervals in the x-direction of the battery module body; the battery cells 1 and insulating isolation seats 2 at adjacent positions are fixed by the fixing strap 3, and the fixing strap 3 is wound around the outer periphery of the battery cell 1; the multiple battery cells 1 are connected in series through the connection row 4, and the connection row 4 is arranged at the upper end of the battery cell 1.

[0021] In one embodiment, according to the actual situation, the multiple battery cells 1 can also be connected in parallel through the connection row 4; in addition, an insulating isolation seat 2 is arranged between adjacent battery cells 1. The insulating isolation seat 2 can not only prevent the adjacent battery cells 1 from affecting each other, but also play a role in supporting the battery cell 1.

[0022] Specifically, the insulating isolation seat 2 is a T-shaped structure composed of a partition plate 21 and a support plate 22, and the lower end of the partition plate 21 is fixedly connected to the upper end of the support plate 22;

[0023] The main body of the partition plate 21 is composed of multiple heat dissipation tubes 211. The multiple heat dissipation tubes 211 are arranged in sequence and fixedly connected in the z-direction, and the length direction of the heat dissipation tube 211 is the same as the width direction of the battery cell 1; it can be understood that the thickness of the partition plate 21 body is equal to the outer diameter of the heat dissipation tube 211. Through such a setting, the two main end faces of the partition plate 21 are in a corrugated structure. When the insulating isolation seat 2 is arranged between two battery cells 1, the battery cell 1 and the partition plate 21 are in line contact. Compared with the prior art, less contact area can expand the gap between the battery cell 1 and the insulating isolation seat 2 and avoid heat accumulation inside the battery module; in the battery module, the fixing strap 3 alternatively passes through the heat dissipation tube 211, making the structure of the battery module more stable.

[0024] In one embodiment, considering the structural rigidity of the partition plate 21, the multiple heat dissipation tubes 211 can all be hollow, or some can be hollow and some can be solid.

[0025] Furthermore, a square hole 23 is also opened in the middle of the partition plate 21. The square hole 23 plays a role in converging heat flow. After the battery system generates heat during operation, the heat can be discharged not only through the gaps between the corrugations on the main end face of the partition plate 21, but also through the square hole 23 and the heat dissipation tube 211; in addition, the square hole 23 can further reduce the contact area between the battery cell 1 and the partition plate 21, further reducing heat accumulation inside the battery module.

[0026] In this embodiment, for the integrity of the battery module, the length and width of the partition 21 are not greater than the length and width of the battery cell 1. That is to say, the main plane area of the partition 21 is smaller than the areas of the front and rear end faces of the battery cell 1. It can be understood that the partition 21 is located inside the battery module body.

[0027] The lower end of the battery cell 1 is press-connected to the upper end of the support plate 22. The support plate 22 can support the battery cell 1 as a bottom support, making the structure of the battery module more stable. In addition, the contact area between the support plate 22 and the battery cell 1 is smaller than the area of the lower end face of the battery cell 1, so that part of the lower end face of the battery cell 1 is always exposed, and the heat generated at the lower end of the battery cell 1 can freely dissipate.

[0028] In this embodiment, two fixing bands 3 are sleeved on the outer periphery of each battery cell 1. The fixing bands 3 are generally made of plastic-steel bands.

[0029] Through this technical solution, by providing an insulating isolation seat between the battery cells, the insulating isolation seat is composed of a partition and a support plate. The main end face of the partition is a corrugated structure, so that the partition is in line contact with the battery cell. The support plate holds up the battery cell. The partition is composed of multiple heat dissipation tubes. At the same time, the insulating isolation seat and the battery cell are fixed by fixing bands. The fixing bands penetrate through the heat dissipation tubes. The battery cells are connected by connection bars. Through these measures, the internal gaps of the battery module are increased, while improving the energy density of the battery system, it can also avoid heat accumulation inside the battery module and improve the safety performance of the battery system.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compact battery system, comprising a battery module, a thermal management system, a battery management system, an electrical system and a structural member, characterized in that: The battery module includes a plurality of battery cells (1), an insulating isolation seat (2), a fixing strap (3), and a connecting row (4); the battery cells (1) and the insulating isolation seat (2) are arranged at intervals along the length direction of the battery module body, and the battery cells (1) and the insulating isolation seat (2) at adjacent positions are fixed by the fixing strap (3). Among them, the fixing strap (3) penetrates through the insulating isolation seat (2), and at least part of the outer side surface of the battery cell (1) is in line contact or point contact with the insulating isolation seat (2); the plurality of battery cells (1) are connected in series through the connecting row (4).

2. The compact battery system according to claim 1, characterized in that: The insulating isolation seat (2) includes a partition plate (21); the two main end faces of the partition plate (21) are in a corrugated structure; the partition plate (21) is in line contact with the outer side surface of the battery cell (1).

3. The compact battery system according to claim 2, characterized in that: The partition plate (21) is composed of a plurality of heat dissipation tubes (211); the plurality of heat dissipation tubes (211) are arranged in sequence along the height direction of the battery module body.

4. The compact battery system according to claim 3, characterized in that: At least part of the plurality of heat dissipation tubes (211) is a hollow structure.

5. The compact battery system according to claim 3, characterized in that: Square holes (23) are formed in the partition plate (21); the square holes (23) are communicated with the space outside the battery module body through the heat dissipation tubes (211).

6. The compact battery system according to claim 1, characterized in that: The insulating isolation seat (2) further includes a support plate (22); the support plate (22) is fixedly arranged at the lower end of the partition plate (21); the battery cell (1) at the corresponding position is crimped with the support plate (22).

7. The compact battery system according to claim 2, wherein: The partition plate (21) is located inside the battery module body.

8. The compact battery system according to claim 6, wherein: At least part of the upper end surface of the support plate (22) coincides with the lower end surface of the battery cell (1).

9. The compact battery system according to claim 3, characterized in that: Two fixing straps (3) are sleeved on the outer periphery of each battery cell (1); the fixing straps (3) at the corresponding positions selectively penetrate through the heat dissipation tubes (211).

10. The compact battery system according to claim 1, characterized in that: The fixing strap (3) is a plastic-steel strap.

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