Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a shell, a battery module, a BMS (Battery Management System) module and two locking nuts, the shell comprises a box body with an upper opening and a box cover covering the opening of the box body, and two mounting through holes are formed in the box cover; the battery module is accommodated in the shell and is bonded with the box body through glue; the BMS module is accommodated in the shell and is locked and fixed on the battery module, a battery cell total positive input end and a battery cell total negative input end of the BMS module are respectively connected with a module positive output electrode and a module negative output electrode of the battery module, and a battery output positive electrode and a battery output negative electrode of the BMS module respectively penetrate through two mounting through holes of the box cover; the two locking nuts are located outside the shell and are in threaded connection with the battery output positive electrode and the battery output negative electrode of the BMS module respectively so as to lock the battery output positive electrode and the battery output negative electrode of the BMS module and the box cover. The battery pack disclosed by the utility model has the advantages of few parts, simple structure and easiness in production.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery pack. Background Art

[0002] In the existing battery pack, generally, a battery module and a BMS (Battery Management System) module are installed together in a battery pack housing. The total positive output terminal and the total negative output terminal of the battery cells in the battery module both need to be connected to the BMS module through copper bars or power cables. The positive battery output terminal and the negative battery output terminal of the BMS module are then connected to the positive battery output pole and the negative battery output pole fixed on the housing through copper bars or power cables. The housing generally includes a connected box cover and a box body. Many of the box cover and the box body are connected by a plurality of screws, which causes the problem of troublesome disassembly and assembly. A few of the box cover and the box body are connected by a plurality of glues, which causes the problem of non-destructive disassembly and assembly. Based on the foregoing, the existing battery pack has the problems of many parts and difficult production.

[0003] In view of the existence of the above problems, it is necessary to study a battery pack, which has the advantages of few parts and easy production. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery pack, which has the advantages of few parts and easy production.

[0005] To achieve the above object, the solution of the utility model is:

[0006] A battery pack, which comprises a housing, a battery module, a BMS module, and two locking nuts; the housing includes a box body with an upper opening and a box cover covering the opening of the box body, and two mounting through holes are opened on the box cover; the battery module is accommodated in the housing and bonded to the box body by glue, and the battery module has a module positive output pole and a module negative output pole; the BMS module is accommodated in the housing and locked to the battery module, the total positive input terminal and the total negative input terminal of the battery cells of the BMS module are respectively connected to the module positive output pole and the module negative output pole, and the positive battery output terminal and the negative battery output terminal of the BMS module respectively pass through the two mounting through holes of the box cover; the two locking nuts are located outside the housing, and the two locking nuts are respectively screwed to the positive battery output terminal and the negative battery output terminal of the BMS module to lock the positive battery output terminal and the negative battery output terminal of the BMS module to the box cover.

[0007] The battery module includes a plurality of battery cells, a first bus bar, a second bus bar, a first insulating bracket, a second insulating bracket, and the positive output terminal and the negative output terminal of the module; the first bus bar and the second bus bar are respectively fixed to the first insulating bracket and the second insulating bracket, each battery cell is clamped between the first insulating bracket and the second insulating bracket and each battery cell is welded to the first bus bar and the second bus bar, and the positive output terminal and the negative output terminal of the module are connected to the first bus bar.

[0008] The battery module further includes a first insulating sheet and a second insulating sheet. The first insulating sheet is fitted on the side of the first insulating bracket away from the second insulating bracket and covers the first bus bar; the second insulating sheet is fitted on the side of the second insulating bracket away from the first insulating bracket and covers the second bus bar.

[0009] The first insulating sheet and the second insulating sheet are respectively bonded to the first insulating bracket and the first insulating bracket.

[0010] The materials of the first insulating sheet and the second insulating sheet are PC.

[0011] The battery module further includes a plurality of locking bolts, and the first insulating bracket and the second insulating bracket are locked to each other by the respective locking bolts.

[0012] The BMS module is locked to the first insulating bracket and the second insulating bracket of the battery module by locking screws.

[0013] The total positive input terminal and the total negative input terminal of the battery cells of the BMS module are respectively locked to the positive output terminal and the negative output terminal of the battery module by conductive screws.

[0014] The total positive input terminal and the total negative input terminal of the battery cells of the BMS module are respectively welded to the positive output terminal and the negative output terminal of the battery module.

[0015] The positive battery output terminal and the negative battery output terminal of the BMS module are respectively provided with a first limiting portion and a second limiting portion; the box cover is provided with two limiting slots that are respectively and limitingly inserted into the first limiting portion and the second limiting portion.

[0016] After adopting the above solution, for the battery pack of the present utility model, the total positive input terminal and the total negative input terminal of the battery cells of the BMS module are respectively connected to the module positive output terminal and the module negative output terminal of the battery module. The battery output positive terminal and the battery output negative terminal of the BMS module can directly serve as the positive output and the negative output of the battery pack. In this way, there is no need to set up the existing copper bars or power cables, so that the battery pack of the present utility model has fewer parts and a simplified structure, which helps to make the battery pack of the present utility model easy to produce. In addition, the present utility model uses a method in which the box cover is fixed to the BMS module by screwing the box cover to the battery output positive terminal and the battery output negative terminal of the BMS module respectively through two locking nuts. In this way, glue or multiple screws are not needed to fix the box cover, which not only helps to simplify the structure of the battery pack of the present utility model, but also makes the installation of the box cover more convenient, which helps to make the battery pack of the present utility model easy to produce. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the present utility model.

[0018] Figure 2 It is an exploded structural diagram of the present utility model.

[0019] Figure 3 It is a schematic structural diagram of the box body of the present utility model.

[0020] Figure 4 It is a schematic structural diagram of the box cover of the present utility model.

[0021] Figure 5 It is a schematic diagram of the cooperation between the battery module and the BMS module of the present utility model.

[0022] Figure 6 It is a schematic structural diagram of the battery module of the present utility model.

[0023] Figure 7 It is a schematic diagram of a partial structure of the battery module of the present utility model Figure 1 。

[0024] Figure 8 It is a schematic diagram of a partial structure of the battery module of the present utility model Figure 2 。

[0025] Figure 9 It is an exploded structural diagram of the battery module of the present utility model.

[0026] Label Description:

[0027] Outer shell 1, box body 11, box cover 12, mounting through hole 121, limiting slot 122, limiting block 1221,

[0028] Battery module 2, battery cell 20, module positive output terminal 21, module negative output terminal 22, first bus bar 23, second bus bar 24, first insulating bracket 25, second insulating bracket 26, first insulating sheet 27, second insulating sheet 28, locking bolt 29,

[0029] BMS module 3, total positive input terminal of battery cells 31, total negative input terminal of battery cells 32, battery output positive electrode 33, first limiting portion 331, battery output negative electrode 34, second limiting portion 341,

[0030] Locking nut 4,

[0031] Conductive screw 5,

[0032] Glue 6,

[0033] Locking screw 7. Specific implementation manner

[0034] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail below through specific embodiments.

[0035] As Figures 1 to 9 shown, the present invention discloses a battery pack, which includes a housing 1, a battery module 2, a BMS module 3, and two locking nuts 4; wherein, the housing 1 includes a box body 11 with an upper opening and a box cover 12 covering the opening of the box body 11, and two mounting through holes 121 are provided on the box cover 12; the battery module 2 is accommodated in the housing 1 and bonded to the box body 11 through glue 6, and the battery module 2 has a module positive output terminal 21 and a module negative output terminal 22; the BMS module 3 is accommodated in the housing 1 and locked to the battery module 2, the total positive input terminal 31 and the total negative input terminal 32 of the battery cells of the BMS module 3 are respectively connected to the module positive output terminal 21 and the module negative output terminal 22, and the battery output positive electrode 33 and the battery output negative electrode 34 of the BMS module 3 respectively pass through the two mounting through holes 121 of the box cover 12; the two locking nuts 4 are located outside the housing 1 and the two locking nuts 4 are respectively screwed to the battery output positive electrode 33 and the battery output negative electrode 34 of the BMS module 3, so as to lock the battery output positive electrode 33 and the battery output negative electrode 34 of the BMS module 3 to the box cover 12.

[0036] For the battery pack of the present utility model, the total positive input terminal 31 and the total negative input terminal 32 of the battery cells of the BMS module 3 are respectively connected to the module positive output terminal 21 and the module negative output terminal 22 of the battery module 2. The battery output positive terminal 33 and the battery output negative terminal 34 of the BMS module 3 can directly serve as the positive output and the negative output of the battery pack. In this way, there is no need to set up the existing copper bars or power cables, which reduces the number of parts of the battery pack of the present utility model and simplifies the structure, contributing to the easy production of the battery pack of the present utility model. In addition, the present utility model uses the method that the box cover 12 is screwed to the battery output positive terminal 33 and the battery output negative terminal 34 of the BMS module 3 respectively through two locking nuts 4 to fix the box cover 12 to the BMS module 3. In this way, it is not necessary to use glue 6 or multiple screws to fix the box cover 12, which not only helps to simplify the structure of the battery pack of the present utility model, but also makes the installation of the box cover 12 more convenient, contributing to the easy production of the battery pack of the present utility model.

[0037] To facilitate the understanding of the production of the battery pack of the present utility model, the following introduces the assembly method of the battery cells of the present utility model. The assembly method includes the following steps:

[0038] Step 1: Pour glue 6 into the box body 11;

[0039] Step 2: Fix the BMS module 3 to the battery module 2, and connect the total positive input terminal 31 and the total negative input terminal 32 of the BMS module 3 to the module positive output terminal 21 and the module negative output terminal 22 of the battery module 2 respectively;

[0040] Step 3: Place the battery module 2 into the box body 11 so that the battery module 2 is bonded to the box body 11 through the glue 6;

[0041] Step 4: Cover the opening of the box body 11 with the box cover 12, and make the battery output positive terminal 33 and the battery output negative terminal 34 of the BMS module 3 pass through the two installation through holes 121 of the box cover 12 respectively;

[0042] Step 5: Screw the two locking nuts 4 to the battery output positive terminal 33 and the battery output negative terminal 34 of the BMS module 3 respectively to lock the battery output positive terminal 33 and the battery output negative terminal 34 of the BMS module 3 to the box cover 12.

[0043] From the above assembly method, it can be seen that the assembly method of the battery pack of the present utility model is simple and only requires five steps, thus making the battery pack of the present utility model easy to produce.

[0044] In an embodiment of the present utility model, the battery module 2 includes a plurality of battery cells 20, a first bus bar 23, a second bus bar 24, a first insulating bracket 25, a second insulating bracket 26, and the module positive output terminal 21 and the module negative output terminal 22; the first bus bar 23 and the second bus bar 24 are respectively fixed to the first insulating bracket 25 and the second insulating bracket 26, and each battery cell 20 is clamped between the first insulating bracket 25 and the second insulating bracket 26. Each battery cell 20 is welded to the first bus bar 23 and the second bus bar 24 so that the battery cells 20 are connected in series and / or in parallel through the first bus bar 23 and the second bus bar 24, and the module positive output terminal 21 and the module negative output terminal 22 are connected to the first bus bar 23.

[0045] In an embodiment of the present utility model, the battery module 2 may further include a first insulating sheet 27 and a second insulating sheet 28. The first insulating sheet 27 is fitted on the side of the first insulating bracket 25 away from the second insulating bracket 26 and covers the first bus bar 23; the second insulating sheet 28 is fitted on the side of the second insulating bracket 26 away from the first insulating bracket 25 and covers the second bus bar 24; the present utility model can prevent the first bus bar 23 and the second bus bar 24 from contacting external conductors and causing damage to the battery module 2 through the first insulating sheet 27 and the second insulating sheet 28. Among them, the first insulating sheet 27 and the second insulating sheet 28 may be adhesively bonded to the first insulating bracket 25 and the first insulating bracket 25 respectively; the materials of the first insulating sheet 27 and the second insulating sheet 28 may be PC or other insulating materials.

[0046] In an embodiment of the present utility model, the battery module 2 may further include a plurality of locking bolts 29. The first insulating bracket 25 and the second insulating bracket 26 are locked to each other through the locking bolts 29, so that the overall strength of the battery module 2 can be higher.

[0047] In an embodiment of the present utility model, the BMS module 3 is locked to the battery module 2 by locking screws 7 with the first insulating bracket 25 and the second insulating bracket 26 of the battery module 2.

[0048] In an embodiment of the present utility model, the total positive input terminal 31 of the battery cells and the total negative input terminal 32 of the battery cells of the BMS module 3 are respectively locked to the module positive output terminal 21 and the module negative output terminal 22 of the battery module 2 through conductive screws 5, so that the total positive input terminal 31 of the battery cells and the total negative input terminal 32 of the battery cells of the BMS module 3 are respectively connected and conducted with the module positive output terminal 21 and the module negative output terminal 22 of the battery module 2. It should be noted that the total positive input terminal 31 of the battery cells and the total negative input terminal 32 of the battery cells of the BMS module 3 may also be respectively welded to the module positive output terminal 21 and the module negative output terminal 22 of the battery module 2.

[0049] In an embodiment of the present utility model, a first limiting portion 331 and a second limiting portion 341 are respectively provided on the battery output positive electrode 33 and the battery output negative electrode 34 of the BMS module 3; the box cover 12 is provided with two limiting slots 122 respectively and limitedly inserted with the first limiting portion 331 and the second limiting portion 341; thus arranged, it can effectively prevent the battery output positive electrode 33 and the battery output negative electrode 34 from rotating relative to the box cover 12. Among them, each limiting slot 122 can be composed of two spaced limiting blocks 1221.

[0050] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by those of ordinary skill in the relevant technical field should be regarded as not departing from the patent scope of the present utility model.

Claims

1. A battery pack, characterized in that: It includes a housing, a battery module, a BMS module, and two locking nuts; The housing includes a box body with an upper opening and a box cover covering the opening of the box body. Two mounting through holes are provided on the box cover; The battery module is accommodated in the housing and bonded to the box body with glue. The battery module has a module positive output terminal and a module negative output terminal; The BMS module is accommodated in the housing and locked to the battery module. The total positive input terminal and the total negative input terminal of the BMS module are respectively connected to the module positive output terminal and the module negative output terminal. The battery output positive terminal and the battery output negative terminal of the BMS module respectively pass through the two mounting through holes of the box cover; The two locking nuts are located outside the housing, and the two locking nuts are respectively screwed to the battery output positive terminal and the battery output negative terminal of the BMS module to lock the battery output positive terminal and the battery output negative terminal of the BMS module to the box cover.

2. The battery pack according to claim 1, characterized in that: The battery module includes a plurality of battery cells, a first bus bar, a second bus bar, a first insulating bracket, a second insulating bracket, and the module positive output terminal and the module negative output terminal; the first bus bar and the second bus bar are respectively fixed to the first insulating bracket and the second insulating bracket. Each battery cell is clamped between the first insulating bracket and the second insulating bracket, and each battery cell is welded to the first bus bar and the second bus bar. The module positive output terminal and the module negative output terminal are connected to the first bus bar.

3. The battery pack according to claim 2, characterized in that: The battery module further includes a first insulating sheet and a second insulating sheet. The first insulating sheet is fitted on the side of the first insulating bracket away from the second insulating bracket and covers the first bus bar; the second insulating sheet is fitted on the side of the second insulating bracket away from the first insulating bracket and covers the second bus bar.

4. The battery pack according to claim 3, wherein: The first insulating sheet and the second insulating sheet are respectively bonded to the first insulating bracket and the first insulating bracket.

5. The battery pack according to claim 3, characterized in that: The materials of the first insulating sheet and the second insulating sheet are PC.

6. The battery pack according to claim 2, characterized in that: The battery module further includes a plurality of locking bolts, and the first insulating bracket and the second insulating bracket are locked to each other through the respective locking bolts.

7. The battery pack according to claim 2, wherein: The BMS module is locked to the first insulating bracket and the second insulating bracket of the battery module through locking screws.

8. The battery pack according to claim 1, wherein: The total positive input terminal and the total negative input terminal of the BMS module are respectively locked to the module positive output terminal and the module negative output terminal of the battery module through conductive screws.

9. The battery pack according to claim 1, characterized in that: The total positive input terminal and the total negative input terminal of the BMS module are respectively welded to the module positive output terminal and the module negative output terminal of the battery module.

10. The battery pack according to claim 1, wherein: The battery output positive terminal and the battery output negative terminal of the BMS module are respectively provided with a first limiting portion and a second limiting portion; the box cover is provided with two limiting slots respectively limitingly inserted with the first limiting portion and the second limiting portion.

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