CN220065885U

CN220065885U - Battery pack and power device

Info

Publication number: CN220065885U
Application number: CN202321458412.0U
Authority: CN
Inventors: 许鑫; 黄强
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2023-11-21
Anticipated expiration: 2033-06-08

Abstract

The utility model discloses a battery pack and a power device, wherein the battery pack comprises a box body, a sodium ion battery pack and a lithium ion battery pack, and the sodium ion battery pack and the lithium ion battery pack are arranged in the box body; the sodium ion battery packs and the lithium ion battery packs are arranged along a first direction, and the sodium ion battery packs are provided with two groups in a second direction perpendicular to the first direction, wherein the two groups of sodium ion battery packs are respectively positioned at two sides of the lithium ion battery packs. According to the battery pack provided by the embodiment of the utility model, the two groups of sodium ion battery packs and the lithium ion battery pack are arranged in the battery pack, and in the second direction, the two groups of sodium ion battery packs are respectively positioned at two sides of the lithium ion battery pack, so that the cost of the battery pack can be reduced; and when the power device is extruded by side collision, the sodium ion battery pack is extruded earlier than the lithium ion battery pack, and the sodium ion battery pack is safer than the lithium ion battery pack, so that the risk of fire explosion of the battery pack can be reduced, and the safety of the battery pack can be improved.

Description

Battery pack and power device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack and a power device.

Background

In the related art, the power battery is mainly composed of single lithium ion batteries connected in series and in parallel as a main component of the power device, and the cost of a battery system is high, but in recent years, the price of the power battery is always high due to the increase of the price of raw materials of the lithium ion battery. On the other hand, the extrusion caused to the power battery when the power device collides with the side needs to be considered, so that the thermal runaway of the power battery caused in the side collision process of the power device is avoided.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery pack, in which two sodium ion battery packs and two lithium ion battery packs are disposed, so that the cost of the battery pack can be reduced; and when the power device is extruded by side collision, the sodium ion battery pack is safer than the lithium ion battery pack, so that the risk of fire explosion of the battery pack can be reduced, and the safety of the battery pack can be improved.

The utility model also provides a power device with the battery pack.

According to an embodiment of the first aspect of the present utility model, a battery pack includes: a case; the sodium ion battery pack and the lithium ion battery pack are arranged in the box body; the sodium ion battery packs and the lithium ion battery packs are all arranged along a first direction, and in a second direction perpendicular to the first direction, the sodium ion battery packs are provided with two groups, and the two groups of sodium ion battery packs are respectively positioned on two sides of the lithium ion battery packs.

According to the battery pack provided by the embodiment of the utility model, the two groups of sodium ion battery packs and the lithium ion battery pack are arranged in the battery pack, and in the second direction, the two groups of sodium ion battery packs are respectively positioned at two sides of the lithium ion battery pack, so that the cost of the battery pack can be reduced; and when the power device is extruded by side collision, the sodium ion battery pack is extruded earlier than the lithium ion battery pack, and the sodium ion battery pack is safer than the lithium ion battery pack, so that the risk of fire explosion of the battery pack can be reduced, and the safety of the battery pack can be improved.

According to some embodiments of the utility model, in the first direction, both ends of the sodium ion battery pack are abutted with the case.

According to some embodiments of the utility model, the sodium-ion battery pack comprises a plurality of sodium-ion cells arranged along the first direction, each of the sodium-ion cells comprising a plurality of sodium-ion cells arranged along the first direction.

According to some embodiments of the utility model, in the first direction, a plurality of the sodium ion batteries are in contact in sequence.

According to some embodiments of the utility model, each sodium ion battery further comprises a protective shell, the protective shell comprises two side plates and two end plates, the two side plates are spaced apart along the first direction, the two end plates are spaced apart along the second direction, two sides of each end plate are fixedly connected with the two side plates respectively to form a mounting cavity, and a plurality of sodium ion battery monomers are all mounted in the mounting cavity.

According to some embodiments of the utility model, each of the sodium ion batteries further comprises a buffer disposed between the side plate and the case.

According to some embodiments of the utility model, the lithium ion battery pack is provided with at least one group, the lithium ion battery pack of each group comprises a plurality of lithium ion batteries, the plurality of lithium ion batteries are arranged at intervals along a first direction, the lithium ion batteries comprise a plurality of flaky lithium ion battery cells, and the plurality of flaky lithium ion battery cells are arranged along the first direction.

According to some embodiments of the utility model, the bottom wall of the case is provided with a barrier rib for spacing the sodium ion battery pack and the lithium ion battery pack apart, and the buffer is further provided between the side plate and the barrier rib.

According to some embodiments of the utility model, in the first direction, at least one end of the lithium ion battery pack is spaced apart from the case to construct a receiving cavity, and the battery pack further includes a controller located within the receiving cavity.

A power plant according to an embodiment of the second aspect of the present utility model includes a battery pack according to an embodiment of the first aspect of the present utility model described above.

According to the power device provided by the embodiment of the utility model, the cost of the battery pack can be reduced by arranging the battery pack; and when the power device is extruded by side collision, the sodium ion battery pack is safer than the lithium ion battery pack, so that the risk of fire explosion of the battery pack can be reduced, the safety of the battery pack can be improved, the cost of the power device can be reduced and the safety of the power device can be improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of a battery pack according to some embodiments of the utility model;

fig. 2 is a perspective view of a battery pack according to some embodiments of the present utility model;

fig. 3 is an exploded view of a battery pack according to some embodiments of the present utility model;

fig. 4 is a perspective view of a sodium ion battery according to some embodiments of the utility model.

Reference numerals:

10. a battery pack; 11. a receiving chamber;

2. a case; 21. a barrier rib; 22. a bottom wall;

3. a sodium ion battery; 31. a sodium ion battery; 311. sodium ion battery cells; 312. a protective shell; 313. a side plate; 314. an end plate; 316. a buffer member;

41. a lithium ion battery pack; 42. a controller; 43. a lithium ion battery; 431. sheet lithium ion battery cells.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A battery pack 10 according to an embodiment of the present utility model is described below with reference to fig. 1 to 4.

Referring to fig. 1 to 4, the battery pack 10 includes a case 2, a sodium ion battery pack 3, and a lithium ion battery pack 41, and the sodium ion battery pack 3 and the lithium ion battery pack 41 are all disposed in the case 2. Wherein the sodium ion battery packs 3 and the lithium ion battery packs 41 are each arranged along a first direction (for example, refer to an e1 direction shown in fig. 1), and the sodium ion battery packs 3 are provided with two groups in a second direction (for example, refer to an e2 direction shown in fig. 1) perpendicular to the first direction, the two groups of sodium ion battery packs 3 being located on both sides of the lithium ion battery packs 41, respectively. For example, the sodium ion battery 3 and the lithium ion battery 41 may be electrically connected by copper bars, so that the sodium ion battery 3 and the lithium ion battery 41 may constitute a complete battery system.

In one example, a needling test was performed on a sodium ion battery, sodium ion battery pack 3 described above, and a co-sized lithium iron phosphate battery, lithium iron phosphate battery pack 41 described above. The highest temperature that sodium ion battery became invalid is lower than the highest temperature that lithium iron phosphate battery became invalid, and sodium ion battery cooling is also faster, and sodium ion battery is difficult for causing the inefficacy of adjacent battery like this, also is difficult for causing battery package 10 to take place the fire explosion simultaneously.

When the power device is extruded by side collision, the sodium ion battery pack 3 is extruded earlier than the lithium ion battery pack 41, the sodium ion battery pack 3 is safer than the lithium ion battery pack 41, the risk of fire explosion of the battery pack 10 can be reduced, and the safety of the battery pack 10 can be improved.

The sodium content in the natural world is higher, and the cost of the sodium ion battery pack 3 is lower; however, since the same volume of the sodium ion battery pack 3 is compared with the lithium ion battery pack 41, the energy density of the sodium ion battery pack 3 is lower than that of the lithium ion battery pack 41, and the electric quantity of the sodium ion battery pack 3 is lower than that of the lithium ion battery pack 41; in addition, when the working voltage of the sodium ion battery pack 3 is generally 1V-4V, the sodium ion battery pack 3 is only connected in series to form a battery system, and the suitability of the battery system for the use voltage range of power devices such as a motor, DC-DC and the like is limited. Thus, the sodium ion battery pack 3 and the lithium ion battery pack 41 are assembled into the same battery pack 10, and the sodium ion battery pack 3 and the lithium ion battery pack 41 are connected in series, so that the cost of the battery pack 10 can be reduced, and compared with the battery pack 10 formed by the sodium ion battery pack 3 alone, the energy density of the battery pack 10 can be improved, and the electric quantity of the battery pack 10 can be further improved.

According to the battery pack 10 of the embodiment of the utility model, by arranging two groups of the sodium ion battery packs 3 and the lithium ion battery packs 41 in the battery pack 10, the two groups of the sodium ion battery packs 3 are respectively positioned at two sides of the lithium ion battery packs 41 in the second direction, so that the cost of the battery pack 10 can be reduced; and when the power device is extruded by side collision, the sodium ion battery pack 3 is extruded earlier than the lithium ion battery pack 41, and the sodium ion battery pack 3 is safer than the lithium ion battery pack 41, so that the risk of fire explosion of the battery pack 10 can be reduced, and the safety of the battery pack 10 can be improved.

According to some embodiments of the present utility model, referring to fig. 1-3, in a first direction, both ends of the sodium-ion battery pack 3 are abutted with the case 2, i.e., the sodium-ion battery pack 3 is located closer to the edge of the battery pack 10 than the lithium-ion battery pack 41. When the power device is extruded by side collision, the sodium ion battery pack 3 is in an extrusion-prone area, namely the sodium ion battery pack 3 is extruded easily, the highest temperature of the failure of the sodium ion battery pack 3 is low, the temperature is reduced quickly, the risk of fire explosion of the battery pack 10 during side collision can be reduced, and the safety of the battery pack 10 can be improved.

According to some embodiments of the present utility model, referring to fig. 1-4, the sodium-ion battery pack 3 includes a plurality of sodium-ion cells 31, the plurality of sodium-ion cells 31 being arranged along a first direction. For example, the plurality of sodium ion batteries 31 may be electrically connected by copper bars. When the power device is extruded by side collision, the sodium ion battery 31 may be extruded, and the corresponding sodium ion battery 31 may be replaced without integrally replacing the sodium ion battery pack 3, so that the maintenance cost may be reduced.

Each sodium ion battery 31 comprises a plurality of sodium ion battery monomers 311, the plurality of sodium ion battery monomers 311 are distributed along the first direction, and the positions of the plurality of sodium ion battery monomers 311 in the sodium ion battery 31 can be reasonably arranged, so that the distribution of the sodium ion battery monomers 311 in the sodium ion battery 31 is as much as possible, and the electric quantity of the sodium ion battery 31 can be improved.

According to some embodiments of the present utility model, referring to fig. 1 to 3, in the first direction, the plurality of sodium ion batteries 31 are sequentially abutted, so that the structural strength between the plurality of sodium ion batteries 31 can be enhanced, and thus the strength of the battery pack 10 can be increased.

According to some embodiments of the present utility model, referring to fig. 3-4, each sodium ion battery 31 further includes a protective case 312, the protective case 312 includes two side plates 313 and two end plates 314, the two side plates 313 are spaced apart in a first direction, the two end plates 314 are spaced apart in a second direction, both sides of each end plate 314 are fixedly connected with the two side plates 313, respectively, to construct a mounting cavity, and a plurality of sodium ion battery cells 311 are mounted in the mounting cavity. The protective housing 312 can play a role in protecting the sodium ion battery 31, and when the power device collides and extrudes, the protective housing 312 can protect the sodium ion battery 31 to a certain extent, so that the safety of the sodium ion battery 31 can be improved. For example, the side plates 313 and the end plates 314 may be fixed by welding, so that the connection strength between the side plates 313 and the end plates 314 may be ensured, and both the side plates 313 and the end plates 314 may be made of aluminum plates.

According to some embodiments of the present utility model, referring to fig. 3-4, each sodium ion battery 31 further includes a buffer member 316, the buffer member 316 being disposed between the side plate 313 and the case 2, for example, the buffer member 316 may be adhered to the side plate 313 using an adhesive. When the power device is extruded by side collision, the sodium ion battery 31 is most easily extruded, the buffer piece 316 can have the function of absorbing energy and buffering, and the buffer piece 316 can absorb a certain impact force, so that the impact force transmitted to the sodium ion battery 31 can be reduced, and the sodium ion battery 31 can be protected.

According to some embodiments of the present utility model, referring to fig. 3-4, the cushioning member 316 comprises cushioning foam, which is low cost and provides a good cushioning and energy absorbing effect.

According to some embodiments of the present utility model, referring to fig. 1-3, the lithium ion battery packs 41 are provided with at least one group, the lithium ion battery packs 41 may be provided with one group, the lithium ion battery packs 41 may be further provided with a plurality of groups, and the plurality of groups of lithium ion battery packs 41 may be arranged at intervals along the second direction. The lithium ion battery pack 41 of each group includes a plurality of lithium ion batteries 43, the plurality of lithium ion batteries 43 are spaced apart along the first direction, and the plurality of lithium ion batteries 43 may be electrically connected by using copper bars. The lithium ion battery includes a plurality of flake lithium ion battery cells 431, the plurality of flake lithium ion battery cells 431 are arranged along the first direction, and the plurality of flake lithium ion battery cells 431 may be connected by using an electrical connection sheet. The lithium ion battery 43 may be a sheet-shaped lithium ion battery, and the sodium ion battery 31 is electrically connected to the sheet-shaped lithium ion battery to form the battery pack 10, so that the usage amount of copper bars can be reduced, and the cost of the battery pack 10 can be further reduced.

According to some embodiments of the present utility model, referring to fig. 1-3, the bottom wall 22 of the case 2 is provided with the blocking rib 21, the blocking rib 21 is used to space the sodium ion battery pack 3 and the lithium ion battery pack 41, the blocking rib 21 can play a role in positioning the position of the sodium ion battery pack 3 and the position of the lithium ion battery pack 41, can facilitate the rapid placement of the sodium ion battery pack 3 and the lithium ion battery pack 41 in the case 2, and can also increase the structural strength of the battery pack 10. For example, the barrier rib 21 may be integrally formed with the case 2, so that the barrier rib 21 is secured to the bottom wall 22 of the case 2.

The buffer piece 316 is further arranged between the side plate 313 and the baffle ribs 21, when the power device is extruded by side collision, the sodium ion battery 31 is most easily extruded, the buffer piece 316 can have the function of absorbing energy and buffering, and the buffer piece 316 can absorb a certain impact force, so that the impact force transmitted to the sodium ion battery 31 can be reduced, and the sodium ion battery 31 can be protected; and the buffer members 316 are provided on both side plates 313, so that the sodium ion battery 31 can be further protected. When the sodium ion battery 31 is placed in the case 2, the two side plates 313 of the sodium ion battery 31 do not need to be distinguished, and the sodium ion battery 31 can be quickly placed in the case 2.

According to some embodiments of the present utility model, referring to fig. 1-2, at least one end of the lithium ion battery pack 41 is spaced apart from the case 2 in the first direction to construct the receiving chamber 11, either one end of the lithium ion battery pack 41 is spaced apart from the case 2 to construct the receiving chamber 11, or both ends of the lithium ion battery pack 41 are spaced apart from the case 2 to construct the receiving chamber 11. The battery pack 10 further includes a controller 42, and the controller 42 is located in the accommodating cavity 11, so that the sodium ion battery pack 3 and the lithium ion battery pack 41 can be electrically connected with the controller 42. The battery pack 10 may be incorporated into a power plant consumer via the controller 42, and the battery pack 10 may power the power plant consumer.

The power plant according to the second aspect of the present utility model includes the battery pack 10 according to the first aspect of the present utility model, and the battery pack 10 may provide power support for the power plant.

According to the power device provided by the embodiment of the utility model, by arranging the battery pack 10, the cost of the battery pack 10 can be reduced; and when the power device is extruded by side collision, the sodium ion battery pack 3 is safer than the lithium ion battery pack 41, so that the risk of fire explosion of the battery pack 10 can be reduced, the safety of the battery pack 10 can be improved, the cost of the power device can be reduced, and the safety of the power device can be improved.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, reference to the terms "some embodiments," "optionally," "further," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising:

a case;

the sodium ion battery pack and the lithium ion battery pack are arranged in the box body; wherein,

the sodium ion battery packs and the lithium ion battery packs are all arranged along a first direction, and in a second direction perpendicular to the first direction, the sodium ion battery packs are provided with two groups, and the two groups of sodium ion battery packs are respectively positioned on two sides of the lithium ion battery packs.

2. The battery pack according to claim 1, wherein both ends of the sodium ion battery pack are abutted against the case in the first direction.

3. The battery pack of claim 1, wherein the sodium-ion battery pack comprises a plurality of sodium-ion cells arranged along the first direction, each of the sodium-ion cells comprising a plurality of sodium-ion cells arranged along the first direction.

4. The battery pack according to claim 3, wherein a plurality of the sodium ion batteries are sequentially abutted in the first direction.

5. The battery pack of claim 3, wherein each of the sodium ion batteries further comprises a protective housing comprising two side plates and two end plates, the two side plates being spaced apart in the first direction and the two end plates being spaced apart in the second direction, both sides of each of the end plates being fixedly connected to the two side plates, respectively, to construct a mounting cavity in which a plurality of the sodium ion battery cells are mounted.

6. The battery pack of claim 5, wherein each of the sodium ion batteries further comprises a buffer disposed between the side plate and the case.

7. The battery pack of claim 1, wherein the lithium ion battery pack is provided with at least one group, the lithium ion battery pack of each group comprising a plurality of lithium ion batteries, the plurality of lithium ion batteries being disposed at intervals along a first direction, the lithium ion batteries comprising a plurality of sheet-shaped lithium ion battery cells, the plurality of sheet-shaped lithium ion battery cells being arranged along the first direction.

8. The battery pack of claim 6, wherein the bottom wall of the case is provided with a barrier rib for spacing the sodium ion battery pack and the lithium ion battery pack apart, and the buffer is further provided between the side plate and the barrier rib.

9. The battery pack of claim 1 or 2, wherein at least one end of the lithium ion battery pack is spaced apart from the case in the first direction to construct a receiving cavity, the battery pack further comprising a controller located within the receiving cavity.

10. A power plant comprising a battery pack according to any one of claims 1-9.