CN216529184U

CN216529184U - Battery module and battery pack

Info

Publication number: CN216529184U
Application number: CN202122879667.1U
Authority: CN
Inventors: 张欢; 陈郑阳; 廖勇
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-05-13
Anticipated expiration: 2031-11-23

Abstract

The utility model belongs to the technical field and discloses a battery module and a battery pack. This battery module includes a plurality of electric cores, shell and PTC hot plate. A plurality of electric cores are arranged and fixed in the shell along the length direction of the shell, an opening PTC heating plate is arranged below at least one side face of the shell and can be inserted into the shell from the opening, and the PTC heating plate is located below the electric cores. The battery module is simple in structure, convenient to assemble, capable of being rapidly heated at a low temperature, high in battery charging and discharging efficiency and long in service life.

Description

Battery module and battery pack

Technical Field

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

Background

The battery pack is a power source of the electric vehicle, and generally, one battery pack includes a plurality of battery modules, which are disposed in a housing. The battery module can normally work within a proper temperature range. In winter in northern areas, the external environment temperature is low, and at the moment, great challenge is provided for the battery module. If no good heat preservation heating measures are available, the charging and discharging efficiency and the service life of the battery are affected, and therefore, a heating device is needed for heating the battery module to enable the battery module to be normally used.

The battery module with the heating device in the prior art is complex in structure, difficult to assemble, complex in assembly steps and low in production efficiency.

Therefore, it is desirable to provide a battery module that has a simple structure, is convenient to assemble, and can be heated to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a battery module having a simple structure, convenient assembly, rapid heating at a low temperature, high charging and discharging efficiency of a battery, and a long service life.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a battery module, includes a plurality of electric cores, still includes:

the battery cell comprises a shell, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are arranged and fixed in the shell along the length direction of the shell, and an opening is arranged below at least one side surface of the shell;

the PTC heating plate is inserted into the shell from the opening, and is positioned below the battery core.

Optionally, at least one limiting plate is arranged inside the housing along the length direction of the housing, the limiting plate divides the housing into a plurality of limiting frames, and one battery cell is inserted into each limiting frame.

Optionally, a heat conducting member is disposed between the PTC heating plate and the battery cell.

Optionally, the PTC heating plate and the heat conductive member are connected by adhesion.

Optionally, at least one side of each of the cells is provided with aerogel.

Optionally, the aerogel and the battery core are connected in an adhesive manner.

Optionally, a support part for supporting the PTC heating plate is provided inside the housing.

Optionally, the support portion is a step which is arranged at the bottom of the housing and the end surface of which is parallel to the bottom of the housing.

Optionally, the bottom of the housing is provided with two supporting portions, and a wire passing groove is formed between the two supporting portions.

An object of the present invention is to provide a battery pack, which has high charging and discharging efficiency, a long service life, convenient assembly, and low production cost.

a battery pack comprises a battery management system and the battery module, wherein the battery module is electrically connected with the battery management system.

Has the advantages that:

according to the battery module, the shell is adopted to replace components such as the end plate, the side plate and the packing belt in the prior art, the battery core is inserted into the shell to realize the assembly of the battery core, the simplification of the whole structure is realized, and the assembly procedure is simplified; the PTC heating plate is arranged at the bottom of the shell to heat the battery core, so that the battery module can normally operate at a low temperature, the charging and discharging efficiency of the battery module is improved, the service life of the battery module is prolonged, and the PTC heating plate is positioned at the bottom of the battery core and can uniformly heat a plurality of battery cores; at least one side of shell sets up the opening to the PTC hot plate can be directly follow the opening part insert the shell inside can, the equipment is very convenient.

Drawings

Fig. 1 is a schematic structural view of a battery module according to the present invention;

FIG. 2 is a first schematic structural diagram of a housing provided by the present invention;

FIG. 3 is a second schematic structural view of the housing provided by the present invention;

fig. 4 is a side view of a housing provided by the present invention.

In the figure:

100. an electric core; 200. a housing; 210. a limiting plate; 220. a support portion; 230. a wire passing groove; 300. a PTC heating plate; 400. a heat conductive member; 500. an aerogel; 600. a wire harness.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The battery module needs to be heated to a proper temperature under a low-temperature environment to be normally used. Its structure of the battery module of taking heating device in the prior art is comparatively complicated, and the shell of battery module adopts end plate and curb plate to connect and forms, adopts the packing area to guarantee structural connection firmly outside end plate and curb plate, adopts threaded connection usually between end plate and the curb plate. The number of parts of the battery module is large, the assembly process is very complex, and the battery module provided by the embodiment can effectively solve the problems.

Fig. 1 is a schematic structural diagram of a battery module provided in this embodiment, where the battery module includes a plurality of battery cells 100, a housing 200, and a PTC heating plate 300. A plurality of battery cells 100 are arranged and fixed in the housing 200 along the length direction of the housing 200, an opening is formed below at least one side surface of the housing 200, a PTC heating plate 300 can be inserted into the housing 200 through the opening, and the PTC heating plate 300 is located below the battery cells 100.

The battery module is provided with the shell 200, and the battery cell 100 is inserted into the shell 200 to realize the assembly of the battery cell 100; the PTC heating plate 300 is arranged at the bottom of the shell 200 to heat the battery core 100, so that the battery module can normally operate at low temperature, the charging and discharging efficiency of the battery module is improved, the service life of the battery module is prolonged, and the PTC heating plate 300 is positioned at the bottom of the battery core 100 and can uniformly heat a plurality of battery cores 100; at least one side of the case 200 is provided with an opening, so that the PTC heating plate 300 can be directly inserted into the case 200 from the opening, and the assembly is very convenient; the shell 200 omits end plates, side plates, packing belts and other parts, and has simple integral structure and convenient assembly.

With continued reference to fig. 1, the housing 200 is a rectangular parallelepiped and is integrally formed. The battery cell 100 is a square lithium battery cell 100. In this embodiment, 8 battery cells 100 are disposed in the casing 200, and in other embodiments, the number of the battery cells 100 may be 6, 10, 12, and the like, and the battery cells may be disposed according to use requirements. The lower surface of the PTC heating plate 300 is connected with a wire harness 600, and a battery management system outside the battery module is in communication connection with the PTC heating plate 300 through the wire harness 600 to control the operation of the PTC heating plate 300, wherein the design of the battery management system is a mature prior art in the field and is not described herein.

The opening is provided on the side of the housing 200 in the width direction, and the length of the opening is equal to the width of the PTC heating plate 300, thereby enabling the PTC heating plate 300 to be inserted into the housing 200.

Further, a heat conducting member 400 is arranged between the PTC heating plate 300 and the battery cell 100, and the heat conducting member 400 may be a silica gel pad, so as to ensure that the heat of the PTC heating plate 300 can be transferred to the battery cell 100, thereby sufficiently heating the battery cell 100. In other embodiments, the heat-conducting member 400 may be made of other materials, and any member that facilitates heat conduction is within the scope of the present application. In order to ensure that the heat conductive member 400 and the PTC heating plate 300 are not misaligned, the heat conductive member 400 and the PTC heating plate 300 may be coupled by adhesion. In assembling, the heat conductive member 400 may be adhered to the upper surface of the PTC heating plate 300, and then, the heat conductive member 400 together with the PTC heating plate 300 is inserted into the housing 200 from an opening below the housing 200.

Further, at least one side that can every electricity core 100 sets up aerogel 500, and aerogel 500 can play heat preservation and thermal-insulated effect, reduces calorific loss, guarantees that electricity core 100 is in suitable operating temperature. Alternatively, the connection manner between the aerogel 500 and the battery cell 100 may be bonding.

Fig. 2 and 3 are schematic structural views of the housing 200 in the present embodiment. Referring to fig. 3 and 4, it can be seen that at least one limiting plate 210 is disposed inside the casing 200 along the length direction thereof, and the limiting plate 210 divides the casing 200 into a plurality of limiting frames, and one battery cell 100 is inserted into each limiting frame. Alternatively, the limiting plate 210 and the housing 200 may be integrally formed, or may be fixed by bonding, welding, or screwing. The limiting plate 210 has a limiting effect on the battery cell 100, and prevents the battery cell 100 from shaking inside the casing 200. Adopt this kind of mode to carry on spacingly to electric core 100, it is very convenient when the assembly, only need with electric core 100 insert spacing frame can.

Referring to fig. 3 and 4, it can be seen that the bottom inside the housing 200 is provided with a support part 220, and the support part 220 is used for supporting the PTC heating plate 300, so that the PTC heating plate 300 is clamped in the space at the bottom, thereby limiting and supporting the PTC heating plate 300. The supporting portion 220 may be a step provided at the bottom of the housing 200 and having an end surface parallel to the bottom surface of the housing 200.

In the present embodiment, two steps are provided, respectively at both sides in the length direction of the housing 200, so that the wire guide groove 230 through which the wire harness 600 passes is formed between the two supporting parts 220. In other embodiments, a support part 220 may be disposed in the middle of the bottom of the housing 200, and the spaces at both sides thereof are used for passing wires. The space enclosed by the step surface and the housing 200 may be hollow or solid, and of course, the supporting portion 220 may also be a plurality of protrusions or other structural forms fixed at the bottom of the housing 200, and any structure that can support and limit the PTC heating plate 300 is within the scope of the present application.

The embodiment also provides a battery pack, which comprises a battery management system and the battery module, wherein the battery management system is electrically connected with the battery module to prevent or avoid abnormal conditions such as overdischarge, overcharge or over-temperature of a battery cell. The battery pack has the advantages of high charging and discharging efficiency, long service life, convenience in assembly and low production cost.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a battery module, includes a plurality of electricity core (100), its characterized in that still includes:

the battery cell structure comprises a shell (200), a plurality of battery cells (100) are arranged and fixed in the shell (200) along the length direction of the shell (200), and an opening is arranged below at least one side surface of the shell (200);

a PTC heating plate (300), the PTC heating plate (300) being inserted into the interior of the housing (200) from the opening, the PTC heating plate (300) being located below the battery cell (100).

2. The battery module according to claim 1, wherein at least one limiting plate (210) is disposed inside the housing (200) along a length direction of the housing, and the limiting plate (210) divides the housing (200) into a plurality of limiting frames, and each limiting frame is inserted with one battery cell (100).

3. The battery module according to claim 1, wherein a heat conductive member (400) is disposed between the PTC heating plate (300) and the battery cell (100).

4. The battery module according to claim 3, wherein the PTC heating plate (300) and the heat conductive member (400) are connected by adhesion.

5. The battery module according to claim 1, characterized in that at least one side of each of the battery cells (100) is provided with an aerogel (500).

6. The battery module according to claim 5, characterized in that the aerogel (500) is connected to the battery cells (100) by bonding.

7. The battery module according to claim 1, wherein a support part (220) for supporting the PTC heating plate (300) is provided inside the case (200).

8. The battery module according to claim 7, wherein the support part (220) is a step provided at the bottom of the housing (200) with an end surface parallel to the bottom of the housing (200).

9. The battery module according to claim 7, wherein the bottom of the housing (200) is provided with two support parts (220), and a wire passing groove (230) is formed between the two support parts (220).

10. A battery pack comprising a battery management system, further comprising the battery module according to any one of claims 1 to 9, the battery module being electrically connected to the battery management system.