CN219476908U

CN219476908U - End plate of battery module

Info

Publication number: CN219476908U
Application number: CN202320280063.1U
Authority: CN
Inventors: 桂昊; 邓江南; 杜俊丰; 金佺良; 於洪将
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2023-02-07
Filing date: 2023-02-22
Publication date: 2023-08-04
Anticipated expiration: 2033-02-22

Abstract

The utility model discloses a battery module end plate. The end plate is a plate body which is formed by plastic injection molding and provided with a metal nut, and an inner connecting groove, a wire bundle groove, an outer connecting groove and a lug groove are arranged on the outer side face of the end plate. The inner connecting groove is used for accommodating a first connector connected with an acquisition circuit inside the battery module. The external groove is used for accommodating a second connector which is externally output by the battery module acquisition circuit. The wire harness groove is used for accommodating a wire harness for connecting the first connector and the second connector. The internal connecting groove, the wire bundle groove and the external connecting groove are communicated. The tab groove is used for setting a module tab. The end plate integrates the lug grooves and the acquisition circuit assembly grooves, is an insulator, and does not need to be provided with corresponding insulating parts, so that the overall parts of the module are reduced, the assembly complexity and the cost are reduced, the production efficiency is improved, the weight of the end plate is light, and the overall energy density of the module can be improved.

Description

End plate of battery module

Technical Field

The present utility model relates to a battery module structure, and more particularly, to front and rear end plates of a battery module.

Background

The battery energy storage module is a core component of the electric automobile. Under the prior art, the battery energy storage module of the electric automobile is generally formed by connecting a plurality of battery modules, and the battery modules are formed by connecting a plurality of batteries. The battery module consists of a module frame, a plurality of connected batteries arranged in the module frame and a collecting circuit for detecting the voltage and temperature states of the batteries. The module frame consists of a bottom plate arranged at the bottom, two end plates respectively positioned at the front and the back, two side plates respectively positioned at the two sides and a cover plate arranged at the top. The bottom plate, the two end plates, the two side plates and the cover plate enclose a box structure for accommodating the battery and the acquisition circuit.

In the prior art, an aluminum end plate is generally used as an end plate of a battery module. The aluminum end plate has the advantages of light weight and high strength. On the other hand, from the angle of battery module assembly, often need set up parts such as utmost point ear and collection circuit connecting piece on the end plate, and aluminium system end plate is the electric conductor again, consequently need be equipped with corresponding a great deal of insulating parts, lead to battery module part more, the integrated level is low, the assembly is complicated, with high costs, and take place insulation failure problem such as electric leakage, short circuit easily.

Disclosure of Invention

The utility model aims to solve the problems that: the aluminum end plate is an electric conductor, and a plurality of insulating parts are needed to be equipped, so that the problems of multiple parts of the battery module, low integration level, complex assembly, high cost, easy occurrence of insulation failure such as electric leakage and short circuit and the like are caused.

In order to solve the problems, the utility model adopts the following scheme:

the end plate of the battery module comprises a plate body formed by plastic injection molding, wherein an inner connecting groove, a wire bundle groove and an outer connecting groove are formed in the outer side face of the end plate; the inner connecting groove is used for accommodating a first connector connected with an acquisition circuit inside the battery module; the external groove is used for accommodating a second connector which is externally output by the battery module acquisition circuit; the wire harness groove is used for accommodating a wire harness for connecting the first connector and the second connector; the internal connecting groove, the wire bundle groove and the external connecting groove are communicated.

Further, the inscription groove is in end plate top surface opening, is square structure, through the spread groove with pencil groove intercommunication, the lateral surface notch is provided with first baffle.

Further, a second baffle is arranged along the side edge of the groove opening of the wire harness groove body.

Further, the external connection groove is connected with the wire harness groove, and a first guide inclined plane is arranged on one side, opposite to the wire harness groove, of the external connection groove.

Further, two lug grooves are formed in the outer side face of the end plate; a metal nut for fixing the tab is arranged in the tab groove; the metal nut is formed by integral injection molding when the plate body is subjected to plastic injection molding.

Further, the lug grooves are formed in the top surface of the end plate in an opening mode, a second guide inclined plane is arranged at the bottom of the lug grooves, and a lug supporting step is arranged above the second guide inclined plane.

Further, two side edges of the end plate are respectively provided with a side plate clamping groove; the side plate buckle groove is provided with a guide round chamfer between the side surface and the outer side surface.

Further, a weight reducing groove is arranged on the inner side surface of the end plate; the weight reducing grooves are divided by reinforcing ribs.

Further, two side edges of the end plate are respectively provided with a side plate clamping groove; a transverse supporting beam is arranged between the two side plate fastening grooves.

Further, a pressing plate clamping groove is formed in the top surface of the end plate; and bolt holes penetrating through the end plate are formed in the clamp plate clamping grooves.

The utility model has the following technical effects:

the end plate integrates the lug grooves and the acquisition circuit assembly grooves, is an insulator, and does not need to be provided with corresponding insulating parts, so that the overall parts of the module are reduced, the assembly complexity and the cost are reduced, and the production rate is improved.

The hollow injection molding part formed by plastic injection molding is light in weight, and the energy density of the whole module can be improved.

The end plate is an insulating part, and an additional insulating plate is not required to be added between the end plate and the battery, so that the space utilization rate in the length direction of the module is improved.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present utility model from an outside view.

Fig. 2 and 3 are enlarged views of the upper left and upper right corner portions of fig. 1, respectively.

Fig. 4 is a schematic perspective view of the inner side view of the embodiment of the present utility model.

In the above-described figures of the drawings,

1 is an inscribed groove, 11 is a first baffle, and 12 is a first baffle injection molding process hole;

2 is a wire harness groove, 21 is a second baffle, 22 is a second baffle injection molding process hole, and 29 is a connecting groove;

3 is an external groove, 31 is a first guiding inclined plane;

4 is a tab groove, 41 is a metal nut, 42 is a tab support step, and 43 is a second guide inclined plane;

5 is a clamp plate clamping groove, 51 is a bolt hole;

6 is a side plate clamping groove, 61 is a guide round chamfer;

reference numeral 91 denotes a weight-reducing groove, 92 a reinforcing rib, and 921 a cross support beam.

Description of the embodiments

The utility model is described in further detail below with reference to the accompanying drawings.

Fig. 1 and 4 illustrate an end plate of a battery module, which is a plate body structure integrally injection-molded with plastic and metal nuts. The two sides of the end plate are respectively an outer side surface and an inner side surface. The distinction between the outer side and the inner side of the end plate is based on the position of the end plate assembled into the battery module, the outer side of the end plate is the side of the end plate, which faces outwards after the end plate is assembled into the battery module, the inner side is the side of the end plate, the sides of the end plate perpendicular to the inner side and the outer side are the side surfaces, and the upper side and the lower side are the top surface and the bottom surface respectively. The inner side of the end plate is generally in contact with the battery inside the battery module. An inner connecting groove 1, a wire harness groove 2, an outer connecting groove 3 and a tab groove 4 are arranged on the outer side face of the end plate, and a plurality of weight reducing grooves 91 are arranged on the inner side face. The internal connecting groove 1, the wire harness groove 2 and the external connecting groove 3 are all used for arranging acquisition circuit components, specifically, the internal connecting groove 1 is used for accommodating a first connector connected with an acquisition circuit inside the battery module; the external groove 3 is used for accommodating a second connector which is externally output by the battery module acquisition circuit; the wire harness groove 2 is used for accommodating a wire harness connecting the first connector and the second connector. The inner joint groove 1, the harness groove 2 and the outer joint groove 3 are communicated, or the inner joint groove 1 and the outer joint groove 3 are communicated through the harness groove 2.

Referring to fig. 1, 2 and 3, in this embodiment, 3 inscription grooves 1 are all located at the top of the outer side surface of the end plate, and 3 inscription grooves 1 are all square structures, openings are all provided on the top surface of the end plate, and the notches of the outer side surface are all provided with a first baffle 11. The first shutter 11 is used for the locking of the connector. Here, the first baffle 11 is disposed in the notch of the outer side surface means that the plate surface of the first baffle 11 is flush with the outer side surface of the end plate. In this embodiment, for facilitating demolding of the end plate injection molding, the first baffle plate 11 is provided with a first baffle plate injection molding process hole 12 at a relative position.

The wire bundle groove 2 is positioned below the inscribed groove 1 and is a long and narrow groove which is horizontally arranged in a straight line, and the length of the long groove is about 70% of the width of the end plate. The internal connecting groove 1 is communicated with the wiring harness groove 2 through a vertical connecting groove 29. In this embodiment, for the clamping of the wire harness in the wire harness groove 2, the wire harness is prevented from being separated from the wire harness groove 2, and the second baffle 21 is arranged along the side edge of the groove body notch of the wire harness groove 2. The second baffles 21 are arranged on the upper side and the lower side of the wire bundle groove 2 in a staggered mode. The second baffle 21 is flush with the outside surface of the end plate. In this embodiment, for the purpose of facilitating demolding of the end plate injection molding, the second baffle plate 21 is provided with second baffle plate injection molding process holes 22 at opposite positions.

In this embodiment, there are two external grooves 3. The two external grooves 3 are positioned above the wire bundle groove 2 and between the two internal grooves 1. The bottom of external groove 3 is connected with pencil groove 2, and the top of external groove 3 is provided with first direction inclined plane 31. Here, the top of the external connection groove 3, that is, the opposite side of the external connection groove 3 to the wire harness groove 2. In another embodiment, the external slot 3 may be provided below the wire harness slot 2. At this time, the top of the external connection groove 3 is connected with the wire harness groove 2, and accordingly, the opposite side of the external connection groove 3 to the wire harness groove 2, that is, the bottom of the external connection groove 3, the first guiding slope 31 is at the bottom of the external connection groove 3.

There are two tab slots 4. The two tab grooves 4 are respectively used for arranging a positive electrode tab and a negative electrode tab of the battery module. Both lug grooves 4 are located at the top of the outer side surface of the end plate and above the wire bundle groove 2, and the lug grooves are open at the top surface of the end plate. A metal nut 41 is provided in the tab groove 4. The metal nut 41 in the tab groove 4 is used for fixing the tab. In addition, in order to facilitate the fitting and clamping of the tab in the tab slot 4, the bottom of the tab slot 4 is provided with a second guide slope 43, and a tab support step 42 is provided above the second guide slope 43. The tab support step 42 is below the metal nut 41. The metal nut in the integral one-time injection molding of plastic and metal nut is the metal nut 41 in the tab groove 4.

In addition, it should be noted that there are two tab grooves 4 in this embodiment, that is, when the battery module is assembled with this end plate, both the positive tab and the negative tab of the battery module are mounted on the end plate. Two other situations exist: first, if the collecting circuit connector of the battery module is installed and the tab is installed at two opposite ends, the tab slot 4 is not necessarily provided in the end plate; second, if the positive and negative tabs of the battery module are respectively mounted at two opposite ends of the battery module, the end plate only needs to be provided with one tab slot 4. The metal nut 41 is disposed in the tab groove 4 for fixing the tab and the busbar, so that the plate structure formed by integrally molding the plastic and the metal nut at one time is formed by integrally molding the plastic at one time in the embodiment in which the tab groove is not formed in the end plate.

The weight-reducing grooves 91 on the inner side surface of the end plate are provided with a plurality of weight-reducing grooves 91, and the weight-reducing grooves 91 are divided by reinforcing ribs 92. In the present embodiment, the weight reducing grooves 91 have a square structure, and the reinforcing ribs 92 are distributed in the lateral and longitudinal directions. In addition, in this embodiment, in order to match the connection of the side plates of the battery module, the two side surfaces of the end plate are respectively provided with side plate fastening grooves 6. The side plate locking groove 6 is provided with a guide round chamfer 61 between the side surface and the outer side surface. In order to match the physical strength of the side plate connecting with the side plate fastening groove 6, a wider reinforcing rib is arranged between the two side plate fastening grooves 6, and the wider reinforcing rib is the transverse supporting beam 921. Alternatively, the end plate may be divided into upper and lower regions by the cross support beam 921, and the weight reduction groove 91 on the inner surface of the end plate is provided in the upper and lower regions divided by the cross support beam 921.

Further, a platen clamping groove 5 is provided on the top surface of the end plate of the present embodiment, and a bolt hole 51 is provided in the platen clamping groove 5. The bolt holes 51 are used for providing bolts. By providing bolts in the bolt holes 51, the battery module is thereby fixed in the battery case. The pressing plate clamping groove 5 is used for arranging the pressing plate strip. The pressing strip is used for pressing and holding the battery in the battery module. When the battery module is fixed in the battery box by the bolts arranged in the bolt holes 51, the two ends of the pressing plate strip are simultaneously fixed in the pressing plate clamping groove 5 by the bolts arranged in the bolt holes 51, and therefore the pressing plate strip presses the battery in the battery module.

In addition, it should be noted that the concept of spatial positions of the end plates in, out, up, down, top, bottom, etc. of the present utility model is based on the battery module assembled by the end plates, in conformity with the spatial positions in the battery module.

Claims

1. The battery module end plate is characterized by comprising a plate body formed by plastic injection molding, wherein an inner connecting groove, a wire bundle groove and an outer connecting groove are formed in the outer side surface of the plate body; the inner connecting groove is used for accommodating a first connector connected with an acquisition circuit inside the battery module; the external groove is used for accommodating a second connector which is externally output by the battery module acquisition circuit; the wire harness groove is used for accommodating a wire harness for connecting the first connector and the second connector; the internal connecting groove, the wire bundle groove and the external connecting groove are communicated.

2. The end plate of claim 1, wherein the inner slot is open at the top surface of the end plate, has a square structure, is communicated with the wire harness slot through the connecting slot, and is provided with a first baffle at the notch of the outer side surface.

3. The end plate of claim 1, wherein a second baffle is disposed along a side of the harness slot body slot opening.

4. The end plate of claim 1, wherein the external slot is contiguous with the wire harness slot, and a first guide ramp is provided on an opposite side of the external slot from the wire harness slot.

5. The end plate of claim 1, wherein two tab slots are further provided on an outer side of the end plate; a metal nut for fixing the tab is arranged in the tab groove; the metal nut is formed by integral injection molding when the plate body is subjected to plastic injection molding.

6. The end plate of claim 5 wherein the tab slot is open at the top surface of the end plate, a second guide ramp is provided at the bottom, and a tab support step is provided above the second guide ramp.

7. The end plate of claim 1, wherein the two side edges of the end plate are respectively provided with side plate fastening grooves; the side plate buckle groove is provided with a guide round chamfer between the side surface and the outer side surface.

8. An end plate according to claim 1, wherein the end plate is provided with weight-reducing grooves on its inner side; the weight reducing grooves are divided by reinforcing ribs.

9. The end plate of claim 8, wherein the two side edges of the end plate are respectively provided with side plate fastening grooves; a transverse supporting beam is arranged between the two side plate fastening grooves.

10. The end plate of claim 1, wherein the top surface of the end plate is provided with a platen detent; and bolt holes penetrating through the end plate are formed in the clamp plate clamping grooves.