CN215578788U - Battery module and battery pack - Google Patents

Abstract

The utility model belongs to the technical field of power batteries, a battery module and a battery pack are disclosed, the battery module comprises a module outer frame and two groups of battery components, the battery components comprise a plurality of groups of soft package battery cores, the module outer frame is provided with two groups of holding cavities, the battery components can be held in the corresponding holding cavities, the module outer frame comprises a main body, two groups of side plates, a first end plate and a second end plate, the main body is I-shaped, grooves are arranged on two sides of the main body, and the battery components can be abutted against the inner walls of the corresponding grooves so as to facilitate the heat dissipation of the battery components; the side plates can be covered on the corresponding grooves, so that the side plates and the grooves form accommodating cavities; the first end plate is arranged at one end of the main body and is connected with the main body and the two groups of side plates; the second end plate is arranged at the other end of the main body and is connected with the main body and the two groups of side plates; the main part of this module frame is the I shape to it is fixed with multiunit laminate polymer core, and strengthened the intensity and the rigidity of battery module, thereby realized laminate polymer core's CTP.

Description

Battery module and battery pack

Technical Field

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

Background

Currently, the endurance mileage of the electric vehicle is longer and longer, and how to improve the energy density of the battery pack is a common pursuit of the industry. At present, the end plates and the side plates of a module are reduced by the module-free scheme design (CTP) of the battery pack, and the energy density can be improved by about 30%; meanwhile, the electric connector can be greatly reduced, and the energy loss and the cost in the battery pack can be reduced. The square shell battery cell is easy to group because the battery cell has certain structural strength, and is an absolute mainstream of the current CTP. However, the soft package battery core has poor feasibility of CTP due to poor rigidity of the soft package battery core; in contrast, those skilled in the art can reduce part of the electrical connection members by making the volume of the battery module large; the large battery module generally comprises end plates, side plates, an upper cover plate and a lower cover plate; however, the soft-packaged electrical core in the big module of soft package is in large quantity, and is in groups relatively difficult, and has upper cover plate, lower plate, end plate in the big module of soft package, and its size is big, and the required precision is high, and the welding is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

According to an aspect of this disclosure, provide a battery module to promote battery module's intensity and rigidity, thereby let the CTP design of realizing laminate polymer core.

To achieve the purpose, the following technical scheme is adopted in the disclosure:

the utility model provides a battery module, including module frame and two sets of electric core subassembly, the electric core subassembly includes multiunit laminate polymer core, and multiunit laminate polymer core piles up the setting, the module frame is provided with two sets of holding chambeies, electric core subassembly can the holding in corresponding the holding intracavity, the module frame includes:

the power core assembly comprises a main body, a plurality of connecting rods and a plurality of connecting rods, wherein the main body is I-shaped, grooves are formed in two sides of the main body, and the power core assembly can be abutted to the inner walls of the corresponding grooves;

the side plates can be covered on the corresponding grooves, so that the side plates and the grooves form the accommodating cavities;

the first end plate is arranged at one end of the main body and can be connected with the main body and the two groups of side plates;

and the second end plate is arranged at the other end of the main body and can be connected with the main body and the two groups of side plates.

Preferably, the body comprises:

a first plate;

a second plate parallel to and spaced apart from the first plate;

and the third plate is perpendicular to the first plate and the second plate, and two sides of the third plate are connected with the middle parts of the first plate and the second plate.

Preferably, the battery module further includes:

and the insulating part is used for isolating and insulating two groups of the electric core assembly, and the electric core assembly is close to one end of the first end plate.

Preferably, the insulating part is provided with a slot, and one end of the main body close to the first end plate is provided with a plug tongue which can be plugged in the slot.

Preferably, the insulating part is made of a plastic material.

Preferably, the electric core assembly is bonded in the groove through heat-conducting glue or structural glue.

Preferably, the battery module further includes:

and the bus bar assembly is electrically connected with the electric core assembly through the bus bar assembly.

Preferably, the bus bar assembly includes:

the electrode lugs of the two groups of the electrode core assemblies can be connected with the bus bars;

a bracket through which the bus bar is mounted to an end of the main body near the second end plate.

Preferably, at least one explosion-proof valve is arranged on the first end plate.

According to another aspect of the present disclosure, a battery pack is provided, which includes a housing and a plurality of sets of battery modules, each set of the battery modules being disposed in the housing.

The beneficial effect of this disclosure:

the battery module comprises a module outer frame and two groups of battery core assemblies, wherein each battery core assembly comprises a plurality of groups of soft package battery cores, the soft package battery cores are stacked, the module outer frame is provided with two groups of accommodating cavities, the battery core assemblies can be accommodated in the corresponding accommodating cavities, each module outer frame comprises a main body, two groups of side plates, a first end plate and a second end plate, each main body is I-shaped, grooves are formed in two sides of each main body, and the battery core assemblies can be abutted to the inner walls of the corresponding grooves so as to facilitate heat dissipation of the battery core assemblies; the side plates can be covered on the corresponding grooves, so that the side plates and the grooves form accommodating cavities; the first end plate is arranged at one end of the main body and can be connected with the main body and the two groups of side plates; the second end plate is arranged at the other end of the main body and can be connected with the main body and the two groups of side plates; the main part of this module frame is the I shape to it is fixed with multiunit laminate polymer core, and strengthened the intensity and the rigidity of battery module, thereby realized laminate polymer core's CTP.

Drawings

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

fig. 2 is a schematic view of a body proposed by the present disclosure.

Reference numerals:

1. a module outer frame; 2. an electrical core assembly; 3. an insulating section; 4. a bus bar assembly;

11. a main body; 12. a side plate; 13. a first end plate; 14. a second end plate; 41. a bus bar; 42. a support;

111. a first plate; 112. a second plate; 113. a third plate; 131. an explosion-proof valve.

Detailed Description

The present disclosure is described in further detail below with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not limiting of the disclosure. It should be further noted that, for the convenience of description, only some of the structures relevant to the present disclosure are shown in the drawings, not all of them.

In the description of the present disclosure, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating 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 embodiment, the terms "upper", "lower", "right", etc. are based on the orientations or positional relationships shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present disclosure. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a battery pack, which comprises a shell and a plurality of groups of battery modules, wherein the battery modules are arranged in the shell.

As shown in fig. 1, the battery module includes a module outer frame 1 and two sets of electric core assemblies 2, the electric core assemblies 2 include multiple sets of soft package electric cores, the soft package electric cores are stacked, the module outer frame 1 is provided with two sets of accommodating cavities, the electric core assemblies 2 can be accommodated in the corresponding accommodating cavities, the module outer frame 1 includes a main body 11, two sets of side plates 12, a first end plate 13 and a second end plate 14, the main body 11 is i-shaped, both sides of the main body 11 are provided with grooves, and the electric core assemblies 2 can be abutted against the inner walls of the corresponding grooves, so as to facilitate heat dissipation of the electric core assemblies 2; the side plate 12 can be covered on the corresponding groove, so that the side plate 12 and the groove form an accommodating cavity; the first end plate 13 is arranged at one end of the main body 11 and can be connected with the main body 11 and the two groups of side plates 12; the second end plate 14 is arranged at the other end of the main body 11 and can be connected with the main body 11 and the two groups of side plates 12; the main part 11 of this module frame 1 is the I-shaped to it is fixed with multiunit laminate polymer core, and strengthened the intensity and the rigidity of battery module, thereby realized laminate polymer core's CTP.

Preferably, the main body 11 is an i-beam, and two ends of the i-beam are internally tangent to avoid tabs at two ends of the soft-package battery cell.

Optionally, the main body 11 may also adopt a "]" and a "[" shaped sheet metal bent part, and the two parts are combined into a "] [" shape by welding or bonding, so as to form an i shape; similarly, both ends of the main body 11 should be internally tangent.

In this embodiment, the side plate 12 may be made of the same metal material as the main body 11, or may be made of a plastic material, and in some special battery pack structures, the side plate 12 may not be used, so as to simplify the structure and quality inside the battery pack.

As shown in fig. 2, the main body 11 includes a first plate 111, a second plate 112, and a third plate 113, the second plate 112 being parallel to and spaced apart from the first plate 111; the third plate 113 is disposed perpendicular to the first plate 111 and the second plate 112, and both sides of the third plate 113 are connected to the middle portions of the first plate 111 and the second plate 112, so that the main body 11 of the module frame 1 is formed in an i-shape.

In order to realize the electric connection of the two groups of electric core components 2, the battery module also comprises a bus bar component 4, and the two groups of electric core components 2 are electrically connected through the bus bar component 4; specifically, the busbar assembly 4 comprises busbars 41 and brackets 42, the tabs of the two sets of core assemblies 2 can be connected with the busbars 41, the busbars 41 are mounted at one end of the main body 11 close to the second end plate 14 through the brackets 42, and in addition, the brackets 42 can be used for insulating the tabs of the soft package battery core from the main body 11; this busbar 41 can make two sets of electric core subassemblies 2 carry out series connection or parallelly connected, and the concrete mode of use adjusts according to required voltage.

In order to facilitate the connection of the bus bar 41 with the wire harness in the battery pack, the bus bar 41 in this embodiment is provided with a protrusion, and a through hole is further provided in the second end plate 14, and the protrusion of the bus bar 41 can pass through the through hole in the second end plate 14 to connect with the wire harness in the battery pack.

In order to prevent the short circuit of the ends of the two groups of electric core assemblies 2, which are not provided with the bus bars 41, the insulating part 3 is arranged at one end of the two groups of electric core assemblies 2, which is close to the first end plate 13, and the insulating part 3 is made of plastic material; of course, the insulating part 3 may also be made of other insulating materials.

Preferably, the insulating part 3 is provided with a slot, and one end of the main body 11 close to the first end plate 13 is provided with a tongue, which can be inserted into the slot, so as to mount the insulating part 3 on the main body 11 of the module outer frame 1.

It should be noted that the insulating portion 3 and the bracket 42 of the busbar assembly 4 are mounted on the vertical ribs at both ends of the main body 11 by interference fit.

In order to fix the electric core assembly 2 in the groove, the electric core assembly 2 in the embodiment is bonded in the groove through a heat conducting glue or a structural glue, so as to enhance the heat conductivity between the electric core assembly 2 and the main body 11, thereby facilitating the heat dissipation of the electric core assembly 2; when installing electric core subassembly 2, can all paint heat conduction glue or structure glue at electric core subassembly 2 two upper and lower faces to glue it in the recess of main part 11, promote laminate polymer battery's radiating efficiency simultaneously.

Preferably, the first end plate 13 is provided with at least one explosion-proof valve 131, and when the electric core assembly 2 is out of control due to heat, the explosion-proof valve 131 can realize directional injection of hot air flow, so that heat diffusion between the electric core assembly 2 or the battery module is reduced, and the safety of the battery pack is improved; of course, an explosion-proof valve may be provided on the second end plate 14.

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

Claims (10)

1. The utility model provides a battery module, its characterized in that, includes module frame (1) and two sets of electric core subassembly (2), electric core subassembly (2) include multiunit laminate polymer core, and multiunit laminate polymer core piles up the setting, module frame (1) is provided with two sets of holding chambeies, electric core subassembly (2) can the holding in the correspondence the holding intracavity, module frame (1) includes:

the power core assembly comprises a main body (11), wherein the main body (11) is I-shaped, grooves are formed in two sides of the main body (11), and the power core assembly (2) can be abutted to the inner walls of the corresponding grooves;

the two groups of side plates (12) can be covered on the corresponding grooves, so that the side plates (12) and the grooves form the accommodating cavities;

the first end plate (13) is arranged at one end of the main body (11) and can be connected with the main body (11) and the two groups of side plates (12); and

and the second end plate (14) is arranged at the other end of the main body (11) and can be connected with the main body (11) and the two groups of side plates (12).

2. The battery module according to claim 1, wherein the main body (11) comprises:

a first plate (111);

a second plate (112) arranged parallel to and spaced apart from the first plate (111); and

and a third plate (113) vertically disposed to the first plate (111) and the second plate (112), and both sides of the third plate (113) are connected to the middle portions of the first plate (111) and the second plate (112).

3. The battery module according to claim 1, further comprising:

and the insulating part (3) is used for isolating and insulating two groups of the electric core assembly (2) close to one end of the first end plate (13).

4. The battery module according to claim 3, wherein the insulating part (3) is provided with a slot, and one end of the main body (11) close to the first end plate (13) is provided with a tongue which can be inserted into the slot.

5. A battery module according to claim 3, characterized in that the insulating part (3) is made of a plastic material.

6. The battery module according to claim 1, wherein the cell assembly (2) is bonded in the groove by a thermally conductive adhesive or a structural adhesive.

7. The battery module according to claim 1, further comprising:

and the two groups of electric core assemblies (2) are electrically connected through the bus bar assemblies (4).

8. The battery module according to claim 7, wherein the bus bar assembly (4) comprises:

the bus bars (41) are connected with the lugs of the two groups of the electric core assemblies (2); and

a bracket (42), through which the bus bar (41) is mounted to one end of the main body (11) near the second end plate (14).

9. A battery module according to any one of claims 1-8, characterised in that the first end plate (13) is provided with at least one explosion-proof valve (131).

10. A battery pack comprising a housing and a plurality of battery modules according to any one of claims 1 to 9, the plurality of battery modules being disposed in the housing.

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