CN205355120U

CN205355120U - Battery pack

Info

Publication number: CN205355120U
Application number: CN201620149208.4U
Authority: CN
Inventors: 张上富
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2016-02-29
Filing date: 2016-02-29
Publication date: 2016-06-29
Anticipated expiration: 2026-02-28

Abstract

The utility model provides a battery pack, including two at least electric core unit, BMS control assembly and shells, two at least electric core units with BMS control assembly sets up in the shell, each electric core unit respectively with BMS control assembly electric connection, BMS control assembly is including protecting the casing and stretching out the conducting structure of protection casing, BMS control assembly's electronic component is sealed the protective housing is internal. The utility model provides a battery pack easily dispels the heat, moreover can be under the prerequisite that does not reduce battery pack security level, reduce the protection level of battery pack shell, and reduced the assembly degree of difficulty, improved production efficiency, simultaneously, the be convenient for change maintenance of battery pack later maintenance and electric core unit.

Description

Battery pack

[ technical field ] A method for producing a semiconductor device

The utility model relates to a battery technology field especially relates to a battery package.

[ background of the invention ]

The electric vehicle is a vehicle driven by a rechargeable battery pack to run, and is popular in middle and low income level due to the characteristics of low price, convenience, environmental protection and the like. The rechargeable battery pack generally includes a battery cell module, a Battery Management System (BMS) control module, and a case accommodating the battery cell module and the BMS control module. In order to ensure the safety of the battery cell module and the BMS control module, the box body structure strength of the battery cell module and the BMS control module is very high, so that the aim of strengthening the protection level is fulfilled.

However, the heat generated by the battery cell module in the box body cannot be smoothly discharged out of the box body, so that the temperature in the box body is increased, and safety hazards are brought to the rechargeable battery. Secondly, because the battery module has between a plurality of electric core monomer through the fixed formation of welding frame, whole electric core module size is unstable and weight is bigger, the assembly of giving electric core module, BMS control module group and box has brought the difficulty, assembly efficiency has been reduced, be unfavorable for electric core monomer's change alone moreover, an electric core monomer damages promptly and will lead to whole electric core module to be unable to use, consequently, be unfavorable for maintenance personal to change electric core module rapidly, cost of maintenance is than higher.

[ Utility model ] content

Aiming at the defects of the prior art, the technical problem solved by the utility model is to provide a battery pack, which is not only easy to radiate heat, but also can reduce the protection grade of the battery pack shell, reduce the assembly difficulty and improve the production efficiency on the premise of not reducing the safety grade of the battery pack; meanwhile, the battery pack is convenient to maintain in the later period and the battery core is convenient to replace and maintain.

For solving the technical problem, the technical scheme of the utility model is realized like this:

A battery pack, comprising: at least two cell units, a BMS control assembly and a housing;

the at least two cell units and the BMS control assembly are disposed within the housing;

each battery cell unit is electrically connected with the BMS control assembly;

the BMS control assembly includes a protective housing and a conductive structure extending out of the protective housing, and electronic components of the BMS control assembly are sealed within the protective housing.

Furthermore, each battery cell unit is provided with a conductive structure, and the number of the conductive structures extending out of the protective shell is the same as that of the battery cell units;

and the conductive structure of each battery cell unit is respectively connected with the conductive structure of the BMS control assembly.

Further, the battery pack also comprises at least two cell shells;

each electric core shell is internally sealed with an electric core unit and a part of the printed circuit board PCB;

each battery cell shell extends a conductive structure, and the conductive structures extending from the battery cell shells are connected with the conductive structure of the BMS control assembly.

Further, a heat-conducting glue is arranged in the protective shell of the BSM control assembly.

Furthermore, a pressure sensor controlled by the PCB is also arranged in the battery cell shell;

The pressure sensor is located between a side wall of the cell unit and the cell casing.

Furthermore, a temperature sensor controlled by the PCB is also arranged in the battery cell shell;

the temperature sensor is located between the side wall of the cell unit and the cell casing.

Further, heat-conducting glue is filled in the battery cell shell.

Furthermore, heat-conducting glue is filled between each battery cell unit and the shell.

Furthermore, the conductive structure of each battery cell unit is a conductive elastic sheet, and the conductive structure of the BMS control assembly is a conductive elastic sheet; the conductive elastic sheet of each battery cell unit is fixed with the conductive elastic sheet of the BMS control assembly through a conductive bolt; or,

the conductive structure of each battery cell unit and the conductive structure of the BMS control assembly are realized by utilizing a male-female butt conductive connector; or,

and the conductive structure of each battery cell unit is elastically abutted with the conductive structure of the BMS control assembly.

Furthermore, the conductive structure extending out of each battery cell shell is a conductive elastic sheet, and the conductive structure of the BMS control assembly is a conductive elastic sheet; the conductive elastic sheet extending out of each battery cell shell is fixed with the conductive elastic sheet of the BMS control assembly through a conductive bolt; or,

The conductive structure extending out of each battery cell shell and the conductive structure of the BMS control assembly are realized by utilizing male and female butt-joint conductive connectors; or,

each battery cell shell extends out of the conductive structure and the conductive structure of the BMS control assembly is elastically abutted.

Further, one cell unit may include at least one cell unit.

The utility model has the advantages that:

compared with the prior art, the utility model provides an utilize the sealed BMS control module of protection casing in the battery package, so can reduce the protection level of the box structure of whole battery package, avoided because the encapsulation the difficult heat dissipation problem that leads to that the box structural strength of electricity core module and BMS control module is very high, consequently, the utility model provides a battery package easily dispels the heat, can reduce the protection level of battery package shell under the prerequisite that does not reduce battery package safety level moreover, has reduced the assembly degree of difficulty, has improved production efficiency.

Furthermore, the utility model provides an no longer adopt the battery module in the battery package, but adopt the independent assembly of a plurality of electric core units, consequently can simplify electric core assembling process, improve assembly efficiency, the maintenance of the later stage battery package of also being convenient for reduces cost of maintenance, improves the efficiency of changing electric core.

[ description of the drawings ]

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is an exploded schematic view of a battery pack provided by the present invention.

Fig. 2 is an explosion diagram of the battery cell unit provided by the present invention.

Fig. 3 is a first connection diagram of the conductive structure according to the present invention.

Fig. 4 is a second connection diagram of the conductive structure according to the present invention.

Fig. 5 is a third connection diagram of the conductive structure according to the present invention.

Reference numerals:

100-Battery pack

10-cell unit

11-cell monomer

12-conductive structure

20-BMS control module

201-protective housing

202-conductive structure

30-outer cover

13-cell shell

131-lower casing

132-upper case

14-fixing element

15-conductive bolt

16-male-female butt-joint conductive connector

161-male seat

162-female seat

17-elastic structure

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention clearer, the following detailed description of embodiments of the present invention will be described with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the same are merely exemplary and the invention is not limited to these embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not relevant to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, which is an exploded view of a battery pack provided by the present invention, as shown in fig. 1, the battery pack 100 of the present invention includes at least two battery cells 10, a BMS control module 20, and a housing 30. Wherein the at least two cell units 10 and the BMS control assembly 20 are disposed within the housing 30. Each battery cell unit 10 is electrically connected to the BMS control assembly 20; the BMS control module 20 includes a protective housing 201 and a conductive structure 202 protruding from the protective housing 201, and the electronic components of the BMS control module 20 are sealed within the protective housing 201.

As shown in fig. 1, each of the cell units 10 may be provided with a conductive structure 12, and the number of the conductive structures 202 of the BMS control module 20 protruding out of the protective housing 201 is the same as that of the cell units 10; the conductive structures 12 of the battery cell units 10 are respectively connected to the conductive structures 202 of the BMS control assembly 20.

Alternatively, please refer to fig. 2, which is an explosion diagram of the battery cell unit provided by the present invention, as shown in fig. 2, the battery pack 100 may further include at least two battery cell housings 13; one cell unit 10 and part of a printed circuit board PCB (not shown in the figure) may be sealed inside each cell casing 13; a conductive structure 12 extends from each cell housing 13, and the conductive structure 12 extending from each cell housing 13 is connected to the conductive structure 202 of the BMS control assembly 20.

As shown in fig. 2, the cell casing 13 may include a lower casing 131 and an upper casing 132 coupled to the lower casing 131.

As shown in fig. 1, the battery pack 100 may further include a fixing member 14 for fixedly mounting at least two cell units 10 in the casing 30.

As shown in fig. 1, a heat conductive adhesive (not shown) is filled between each of the cell units 10 and the housing 30, so as to increase a heat dissipation area and perform a shock-proof function.

The utility model discloses in, an electricity core unit 10 can include at least one electric core monomer 11, also, can be an electricity core monomer 11 in an electricity core unit, also can be that two above electric core monomers 11 are parallelly connected or are established ties together.

As shown in fig. 1, the protective case 201 of the BMS control module 20 may be provided therein with a heat conductive paste (not shown), which can perform heat conduction and vibration prevention.

The utility model discloses in, can also be provided with in the electricity core casing 13 and receive the pressure sensor (not shown in the figure) of PCB control, pressure sensor can be located the lateral wall of electricity core unit 10 with between the electricity core casing 13.

In addition, a temperature sensor (not shown in the figure) controlled by the PCB may be further disposed in the cell casing 13, and the temperature sensor may be located between the sidewall of the cell unit 10 and the cell casing 13.

It should be noted that, by providing the pressure sensor and/or the temperature sensor on the side wall of the cell unit 10, after the cell unit 10 is assembled to the cell casing 13, the pressure sensor is compressed by the cell casing 13 and bears a certain pressure, so that before the cell unit 10 fails and is damaged, the shape change amount can be timely detected by the pressure sensor, and the temperature can be timely detected by the temperature sensor before explosion occurs. Thereby, various hazards due to explosion of the cell units 10 can be reduced, and it is also convenient to troubleshoot the badly damaged cell units 10.

The utility model discloses in, can fill in the electric core casing 13 has heat-conducting glue (not shown), so that increase the heat radiating area of electric core unit 10 can also play shockproof effect simultaneously.

Referring to fig. 3, which is a first connection diagram of the conductive structure provided by the present invention, as shown in fig. 3, the conductive structure 12 of each cell unit 10 may be a conductive elastic piece, the conductive structure 202 of the BMS control assembly 20 may be a conductive elastic piece, and the conductive elastic piece of each cell unit 10 and the conductive elastic piece of the BMS control assembly 20 may be fixed by a conductive bolt 15.

Similarly, if the battery cell unit 10 is disposed in the battery cell casing 13, the conductive structure 12 extending out of each battery cell casing 13 may also be a conductive elastic sheet, and the conductive structure 202 of the BMS control assembly 20 may also be a conductive elastic sheet; the conductive spring plate extending from each cell housing 13 and the conductive spring plate of the BMS control assembly 20 may be fixed by the conductive bolt 15 shown in fig. 3.

Referring to fig. 4, which is a second connection diagram of the conductive structure provided by the present invention, as shown in fig. 4, the conductive structure 12 of each cell unit 10 and the conductive structure 202 of the BMS control assembly 20 may be implemented by using a male-female docking conductive connector 16, which may include a male socket 161 and a female socket 162. For example, as shown in fig. 4, the female socket 162 may serve as the conductive structure 12 of the battery cell unit 10, and the male socket 161 may serve as the conductive structure 202 of the BMS control assembly 20, or the female socket 162 may serve as the conductive structure 202 of the BMS control assembly 20, and the male socket 161 may serve as the conductive structure 12 of the battery cell unit 10.

Similarly, if the cell unit 10 is disposed in the cell casing 13, the conductive structure 12 extending from each cell casing 13 and the conductive structure 202 of the BMS control assembly 20 may also be implemented by using male and female mating conductive connectors. Referring to fig. 4, the male-female mating conductive connector may include a male socket 161 and a female socket 162. For example, the female socket 162 may serve as the conductive structure 12 extending from the cell casing 13, and the male socket 161 may serve as the conductive structure 202 of the BMS control assembly 20, or the female socket 162 may serve as the conductive structure 202 of the BMS control assembly 20, and the male socket 161 may serve as the conductive structure 12 extending from the cell casing 13.

Referring to fig. 5, which is a third connection diagram of the conductive structure according to the present invention, as shown in fig. 5, the conductive structure 12 of each cell unit 10 and the conductive structure 202 of the BMS control assembly 20 can be elastically abutted, wherein the elastic abutment can be achieved by adding an elastic structure 17 to the conductive structure 12 and the conductive structure 202.

Similarly, if the cell unit 10 is disposed in the cell housing 13, the elastic contact between the conductive structure 12 extending from each cell housing 13 and the conductive structure 202 of the BMS control assembly 20 can also be achieved by the elastic structure 17 shown in fig. 5.

It should be noted that, in the above manner, the elastic sheet structure 12 of the battery cell unit 10 or the conductive structure 12 extending from the battery cell casing 13 can be fully contacted with the conductive structure 202 of the BMS control assembly, so as to reduce the contact resistance and avoid the problem of heat generation caused by excessive resistance.

For example, the heat conductive glue mentioned in the present invention may be an a/B mixed glue.

In the present invention, when assembling the battery pack 100, the BMS control module 20 is first fixedly mounted in the housing 30. Then, the cell unit 10, the pressure sensor, and the temperature sensor are mounted and fixed in the cell casing 13, and the conductive structure 12 protrudes from the cell casing 13. Next, the cell unit 10 is fixedly mounted in the housing 30 by the fixing member 14, and the conductive structure 202 of the BMS control assembly 20 and the conductive structure 12 protruding from the cell casing 13 are simultaneously brought into electrical contact. Finally, the upper and lower cases of the housing 30 are closed.

It should be noted that, the conductive structure is fixed by the cell unit 10, and in the process of fixing the cell unit 10, the conductive structure 202 of the BMS control assembly 20 and the conductive structure 12 extending from the cell casing 13 need to be contacted simultaneously, and once the cell unit 10 is fixed, the conductive structure is adjusted to be contacted, which may easily cause the conductive structure to fall off and fail.

Because the utility model provides an among the battery package 100, can strengthen the protection level alone with important electric core unit 10, BMS control module 20, thereby make the protection level of shell 30 can reduce, thereby makes air in the shell 30 can with the air outside shell 30 carries out the convection current, and then the thermal discharge rate of acceleration. Of course, since the protection level of the cell unit 10 itself is already high, the cell casing 13 may not be added. The cell casing 13 can be added to provide a great protection for the cell unit 10.

Compared with the prior art, the utility model provides an utilize the sealed BMS control module of protection casing among the battery package 100, so can reduce the protection level of the box structure of whole battery package, avoided because the encapsulation the difficult heat dissipation problem that leads to that the box structural strength of electricity core module and BMS control module is very high, consequently, the utility model provides a battery package easily dispels the heat, can reduce the protection level of battery package shell moreover under the prerequisite that does not reduce battery package safety level, has reduced the assembly degree of difficulty, has improved production efficiency.

It is particularly pointed out that equivalent variations to those skilled in the art in light of the teachings of the present invention that are intended to be included within the scope of the appended claims.

Claims

1. A battery pack, comprising: at least two cell units, a BMS control assembly and a housing;

each battery cell unit is electrically connected with the BMS control assembly;

2. The battery pack of claim 1, wherein each of the cell units is provided with conductive structures, and the number of conductive structures extending out of the protective casing is the same as the number of the cell units;

3. The battery pack of claim 1, further comprising at least two cell housings;

4. The battery pack of claim 1, wherein a thermally conductive adhesive is disposed within the protective housing of the BMS control assembly.

5. The battery pack according to claim 3, wherein: the cell shell is also internally provided with a pressure sensor controlled by the PCB;

6. The battery pack according to claim 3, wherein: the battery cell shell is also internally provided with a temperature sensor controlled by the PCB;

7. The battery pack of claim 3, 5 or 6, wherein: and heat-conducting glue is filled in the battery cell shell.

8. The battery pack according to claim 1, wherein: and heat-conducting glue is filled between each electric core unit and the shell.

9. The battery pack according to claim 2, wherein:

the conductive structure of each battery cell unit is a conductive elastic sheet, and the conductive structure of the BMS control assembly is a conductive elastic sheet; the conductive elastic sheet of each battery cell unit is fixed with the conductive elastic sheet of the BMS control assembly through a conductive bolt; or,

10. The battery pack according to claim 3, wherein:

the conductive structure extending out of each battery cell shell is a conductive elastic sheet, and the conductive structure of the BMS control assembly is a conductive elastic sheet; the conductive elastic sheet extending out of each battery cell shell is fixed with the conductive elastic sheet of the BMS control assembly through a conductive bolt; or,

11. The battery pack of claim 1, wherein one cell unit may include at least one cell unit.