CN214428678U

CN214428678U - Power battery module

Info

Publication number: CN214428678U
Application number: CN202120915270.0U
Authority: CN
Inventors: 董泽永; 韩廷; 刘浩; 张志远; 高灵雷; 杨丹
Original assignee: Gotion High Tech Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-10-19
Anticipated expiration: 2031-04-29

Abstract

The utility model provides a power battery module, it includes: a housing; a battery pack disposed within the housing; the battery comprises a plurality of battery cell units which are arranged in an array in the length direction and the width direction; the battery cell unit comprises a plurality of battery cells which are sequentially stacked along the height direction of the battery pack; a sampling mechanism disposed within the housing; comprises a plurality of sampling components; the plurality of sampling assemblies correspond to the plurality of cell units; the sampling assembly is used for acquiring voltage signals of the electric cores in the corresponding electric core units; a multi-pin socket provided at one side of the housing in a length direction; and the sampling assemblies are electrically connected so that each voltage signal can be transmitted to the signal pin of the multi-pin socket. The utility model provides a power battery module, it can reduce outside wiring, reduces the space that occupies the inside of system, improves the energy density of system.

Description

Power battery module

Technical Field

The utility model relates to a power battery module.

Background

The power battery system is the most important component in the new energy automobile. With the development of new energy automobiles, the requirements on the energy density of a power battery system are higher and higher.

The existing power battery system generally comprises a box body and a plurality of power battery modules arranged in the box body. The power battery module comprises a shell and a battery unit positioned in the shell. In order to monitor whether the individual cells in the battery unit are operated safely and smoothly, at least one voltage sampling line and a plurality of connection terminals are generally introduced into the housing. The two ends of the voltage sampling line are respectively connected with a wiring terminal. The plurality of wiring terminals are respectively arranged on two sides of the shell. The wiring terminal is used for being connected with an external battery management system, and further transmits a voltage signal acquired by the voltage sampling line to the outside. Because the both sides of current power battery module are provided with at least one binding post respectively, so the both sides of this power battery module all need arrange the circuit and carry out the electricity between the external battery management system and connect. Therefore, wiring is complex, more circuits occupy more space in the box body, and energy density in the box body is reduced.

Therefore, it is necessary to provide a power battery module.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power battery module, it can reduce outside wiring, reduces the space that occupies the system inside, improves the energy density of system.

The above object of the present invention can be achieved by the following technical solutions: a power battery module, it includes: a housing; a battery pack disposed within the housing; the battery comprises a plurality of battery cell units which are arranged in an array in the length direction and the width direction; the battery cell unit comprises a plurality of battery cells which are sequentially stacked along the height direction of the battery pack; a sampling mechanism disposed within the housing; comprises a plurality of sampling components; the plurality of sampling assemblies correspond to the plurality of cell units; the sampling assembly is used for acquiring voltage signals of the electric cores in the corresponding electric core units; a multi-pin socket provided at one side of the housing in a length direction; and the sampling assemblies are electrically connected so that each voltage signal can be transmitted to the signal pin of the multi-pin socket.

In a preferred embodiment, the battery cell has a positive plate and a negative plate which are oppositely arranged; the battery pack further comprises a first integrated cover plate and a second integrated cover plate which are arranged on the opposite sides of the battery cell unit along the length direction of the battery cell; and the first integrated cover plate and the second integrated cover plate are respectively provided with a bus bar which is electrically connected with the positive pole piece and/or the negative pole piece, so that the electric cores in the electric core unit can be connected in series and in parallel through the bus bars.

As a preferred embodiment, the sampling assembly includes a flexible circuit board disposed on the corresponding cell unit; the flexible circuit board is electrically connected with the busbars which realize the series and parallel connection of the corresponding battery cell units so as to collect the voltage signals of the battery cells in the corresponding battery cell units.

As a preferred embodiment, the sampling assembly further includes a first sampling sheet and a second sampling sheet respectively disposed on the first integrated cover plate and the second integrated cover plate, one end of the first sampling sheet is welded to the bus bar on the first integrated cover plate, and the other end of the first sampling sheet is welded to one end of the flexible circuit board; one end of the second sampling sheet is welded with the bus bar on the second integrated cover plate, and the other end of the second sampling sheet is welded with the other end of the flexible circuit board.

As a preferred embodiment, the method further comprises: a plurality of adapters; the adapter piece is used for electrically connecting the sampling assemblies adjacent to each other along the length direction of the battery pack so as to enable the sampling assemblies to form a plurality of sampling group sections without electric connection; the multi-pin socket is electrically connected with one end of one of the sampling group sections.

As a preferred embodiment, the method further comprises: the plug connector comprises a first plug connector and a second plug connector which are in plug fit; the first plug-in unit is electrically connected with one of the sampling group sections, the second plug-in unit is electrically connected with the other sampling group section, so that when the first plug-in unit and the second plug-in unit are in plug fit, the other sampling group section can be electrically connected with one of the sampling group sections.

As a preferred embodiment, the method further comprises: and the temperature measuring assembly is used for measuring temperature signals in the battery cell unit and is electrically connected with the sampling assembly so that the temperature signals can be transmitted to the signal pins of the multi-pin socket.

In a preferred embodiment, the multi-pin socket is electrically connected to a battery management system via the signal pin, so that the voltage signal can be transmitted to the battery management system via the signal pin.

The application provides a power battery module's beneficial effect is: the power battery module is provided with a sampling mechanism and a multi-pin socket, wherein the sampling mechanism comprises a plurality of sampling assemblies; the plurality of sampling assemblies correspond to the plurality of cell units; the sampling assembly is used for acquiring voltage signals of each electric core in the corresponding electric core unit; the multi-pin socket is arranged on one side of the shell along the length direction; the multi-pin socket is electrically connected with the plurality of sampling assemblies so that each voltage signal can be transmitted to the signal pin of the multi-pin socket. Therefore, the multi-pin socket can be connected with an external battery management system, and further transmits the voltage signal to the external battery management system. Since the multi-pin socket is disposed at one side of the housing along the length direction, it is only necessary to arrange a circuit at one side of the power battery module according to the embodiment of the present application to electrically connect with an external battery management system. Therefore, external wiring is reduced, the occupied space inside the box body is reduced by fewer lines, and the energy density in the box body is improved. Therefore, the utility model provides a power battery module, it can reduce outside wiring, reduces the space that occupies the inside of system, improves the energy density of system.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of 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 to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a power battery module according to an embodiment of the present disclosure;

fig. 2 is a left side view of a power battery module according to an embodiment of the present disclosure;

fig. 3 is a right side view of a power battery module according to an embodiment of the present disclosure;

fig. 4 is a left side view of a second unit in the power battery module according to the embodiment of the present disclosure;

fig. 5 is an exploded view of a cell unit provided in an embodiment of the present application.

Description of reference numerals:

14. a housing; 15. a cell unit; 17. an electric core; 19. a sampling component; 21. a multi-pin socket; 22. a positive plate; 27. a negative plate; 31. a bus bar; 33. a first integrated cover plate; 34. a second integrated cover plate; 35. a flexible circuit board; 39. a first sampling sheet; 41. a second sampling sheet; 43. an adapter; 45. a first plug-in; 47. a second plug-in; 49. and a temperature measuring component.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1 to 5. The application provides a power battery module, it includes: a housing 14; a battery pack disposed within the housing 14; includes a plurality of cell units 15 arranged in an array in the length direction and the width direction thereof; the cell unit 15 includes a plurality of cells 17 stacked in sequence in the height direction of the battery pack; a sampling mechanism disposed within the housing 14; comprises a plurality of sampling assemblies 19; a plurality of the sampling assemblies 19 correspond to a plurality of the cell units 15; the sampling assembly 19 is configured to collect voltage signals of the cells 17 in the corresponding cell unit 15; a multi-pin socket 21 provided at one side of the housing 14 in a length direction; is electrically connected to a plurality of the sampling assemblies 19 so that each of the voltage signals can be transmitted to the signal pins of the multi-pin socket 21.

The technical scheme shows that: the power battery module of the embodiment of the application is provided with a sampling mechanism and a multi-pin socket 21, wherein the sampling mechanism comprises a plurality of sampling assemblies 19; the plurality of sampling assemblies 19 correspond to the plurality of cell units 15; the sampling assembly 19 is configured to collect voltage signals of each battery cell 17 in the corresponding battery cell unit 15; the multi-pin socket 21 is disposed on one side of the housing 14 along the length direction; the multi-pin socket 21 is electrically connected to the plurality of sampling assemblies 19 so that respective voltage signals can be transmitted to the signal pins of the multi-pin socket 21. In this way, the multi-pin socket 21 can be connected to an external battery management system, and further transmit a voltage signal to the external battery management system. Since the multi-pin socket 21 is provided at one side of the housing 14 in the length direction, it is only necessary to electrically connect the wiring disposed at one side of the power battery module according to the embodiment of the present application and the external battery management system. Therefore, external wiring is reduced, the occupied space inside the box body is reduced by fewer lines, and the energy density in the box body is improved.

In the present embodiment, the power battery module includes a housing 14. The housing 14 is hollow and rectangular as a whole. The hollow portion forms a cavity.

In the present embodiment, a battery pack is provided in the case 14. Specifically, the battery pack is disposed within the cavity. Further, the battery pack includes a plurality of cell units 15 arranged in an array in the length direction and the width direction thereof. For example, as shown in fig. 1, the longitudinal direction of the battery pack is the left-right direction. The width direction of the battery pack is the front-rear direction. The battery pack includes 4 cell units 15 arranged in an array. These 4 electric core units 15 are arranged two side by side along the left-right direction, and are arranged two side by side along the front-back direction. Further, the cell unit 15 includes a plurality of battery cells 17 stacked in order in the height direction of the battery pack. For example, as shown in fig. 5, the height direction of the battery pack is the vertical direction. The cell unit 15 sequentially stacks a plurality of cells 17 in the up-down direction.

Further, the cell 17 has a positive electrode tab 22 and a negative electrode tab 27 disposed oppositely. As shown in fig. 5, for example, the battery cell 17 is provided with a positive electrode tab 22 and a negative electrode tab 27 on both sides in the longitudinal direction thereof. For example, as shown in fig. 5, the longitudinal direction of the battery cell 17 is the left-right direction. In this manner, the positive electrode tab 22 and the negative electrode tab 27 are provided on the left and right sides of the battery cell 17, respectively. Or the negative electrode tab 27 and the positive electrode tab 22 are provided on the left and right sides of the battery cell 17, respectively. That is, the left and right sides of the battery cell 17 are not limited to the positive electrode tab 22 or the negative electrode tab 27. Further, whether the left side and the right side of the battery cell 17 are the positive electrode plate 22 or the negative electrode plate 27 needs to be set according to the series-parallel connection relationship of the battery cell 17. That is, the positive electrode tab 22 and the negative electrode tab 27 of each cell 17 in the cell unit 15 are not limited to being located on the same side.

Further, the battery pack further includes a first integrated cover 33 and a second integrated cover 34 disposed on opposite sides of the cell unit 15 in the length direction of the battery cell 17. For example, as shown in fig. 1, the cell unit 15 is provided with a first integrated cover plate 33 and a second integrated cover plate 34 on both sides in the length direction thereof. For example, as shown in fig. 1, the longitudinal direction of the cell unit 15 is the left-right direction. As such, the left and right sides of the cell unit 15 are provided with the first integrated cover plate 33 and the second integrated cover plate 34, respectively. Further, the first integrated cover plate 33 and the second integrated cover plate 34 are each provided with a bus bar 31 for electrically connecting with the positive pole piece 22 and/or the negative pole piece 27, so that the cells 17 in the cell unit 15 can be connected in series and in parallel through the bus bar 31. Specifically, the bus bar 31 of the first integrated cover plate 33 is welded to the positive electrode tab 22 and/or the negative electrode tab 27 on the left side of the cell unit 15. The bus bar 31 of the second integrated cover plate 34 is welded to the positive electrode tab 22 and/or the negative electrode tab 27 on the right side of the cell unit 15.

Further, at least one first slot is disposed on the first integrated cover plate 33. The at least one may be 1 or more. The plurality may be 2, 3, 4, 5, etc., and this application does not specify so. Further, the first slot is used for allowing the positive plate 22 or the negative plate 27 to pass through, so that the positive plate 22 or the negative plate 27 can be welded with the bus bar 31 on the first integrated cover plate 33.

Further, at least one second slot is disposed on the second integrated cover plate 34. The at least one may be 1 or more. The plurality may be 2, 3, 4, 5, etc., and this application does not specify so. Further, the second slot is used for allowing the positive plate 22 or the negative plate 27 to pass through, so that the positive plate 22 or the negative plate 27 can be welded with the bus bar 31 on the second integrated cover plate 34.

In this embodiment, the sampling mechanism is disposed within the housing 14. Specifically, the sampling mechanism is disposed within the cavity. Further, the sampling mechanism comprises a plurality of sampling assemblies 19. The plurality of sampling assemblies 19 correspond to the plurality of cell units 15. The correspondence may be that the number of sampling assemblies 19 is equal to the number of cell units 15. For example, as shown in fig. 1, the number of the cell units 15 is 4. The number of sampling assemblies 19 is also 4. Specifically, the 4 cell units 15 are a first unit and a second unit located in front, and a third unit and a fourth unit located in rear, respectively. The first cell is located to the left of the second cell. The third cell is located to the left of the fourth cell. Further, the sampling assembly 19 is configured to collect voltage signals of each battery cell 17 in the corresponding battery cell unit 15. Specifically, the sampling assembly 19 includes a flexible circuit board 35 disposed on the corresponding cell unit 15. As shown in fig. 1, for example, the sampling assembly 19 includes a first flexible circuit board 35 disposed on the first unit, a second flexible circuit board 35 disposed on the second unit, a third flexible circuit board 35 disposed on the third unit, and a fourth flexible circuit board 35 disposed on the fourth unit. Further, the flexible circuit board 35 is electrically connected to the bus bar 31 for realizing series and parallel connection of the corresponding battery cell units 15, so as to be able to acquire voltage signals of each battery cell 17 in the corresponding battery cell unit 15. The first flexible circuit board 35 extends in the length direction of the battery pack, as shown in fig. 1, for example. The two ends of the first flexible circuit board 35 are electrically connected to the busbars 31 on the two sides of the first unit, which are connected in series and in parallel, respectively, so as to collect the voltage signals of each electric core 17 in the first unit. The two ends of the second flexible circuit board 35 are electrically connected to the busbars 31 on the two sides of the second unit, which are connected in series and in parallel, respectively, so as to collect the voltage signals of each electric core 17 in the second unit. The number of the third flexible circuit boards 35 is two. The two third flexible circuit boards 35 are electrically connected to the busbars 31 on both sides of the third unit, which are connected in series and in parallel, respectively, so as to collect voltage signals of each electric core 17 in the third unit. The two ends of the fourth flexible circuit board 35 are electrically connected to the busbars 31 on the two sides of the fourth unit, which are connected in series and in parallel, respectively, so as to collect the voltage signals of each electric core 17 in the fourth unit.

Further, as shown in fig. 2, 3 and 4, the sampling assembly 19 further includes a first sampling sheet 39 and a second sampling sheet 41 respectively disposed on the first integrated cover plate 33 and the second integrated cover plate 34. One end of the first sampling piece 39 is welded to the first integrated cover plate 33, and the other end of the first sampling piece 39 is welded to one end of the flexible circuit board 35. One end of the second sampling sheet 41 is welded to the second integrated cover plate 34, and the other end of the second sampling sheet 41 is welded to the other end of the flexible circuit board 35. In this way, the flexible circuit board 35 can be electrically connected to the busbar 31 for realizing the serial and parallel connection of the corresponding battery cell units 15 through the first sampling sheet 39 and the second sampling sheet 41, so as to collect the voltage signals of the corresponding battery cells 17 in the battery cell units 15.

Further, the power battery module of this application embodiment still includes: a plurality of adaptors 43. The adapters 43 electrically connect adjacent sampling assemblies 19 along the length of the battery pack so that a plurality of sampling assemblies 19 form a plurality of sampling pack sections that are electrically disconnected. For example, as shown in fig. 1, the first flexible circuit board 35 is electrically connected to the second flexible circuit board 35 via an adapter 43 to form a first sampling group segment. The third flexible circuit board 35 is electrically connected to the fourth flexible circuit board 35 via an adapter 43 to form a second sampling group segment.

Further, the power battery module of this application embodiment still includes: the plug connector comprises a first plug-in unit 45 and a second plug-in unit 47 which are in plug fit; the first card 45 is electrically connected to one of the sampling group segments, and the second card 47 is electrically connected to the other sampling group segment, so that when the first card 45 and the second card 47 are in plug-in fit, the other sampling group segment can be electrically connected to one of the sampling group segments. For example, as shown in fig. 3, the first card 45 is electrically connected to the bus bar 31 on the right side of the second unit, and the first card 45 is electrically connected to the first sampling group segment. The second card 47 is electrically connected to the bus bar 31 on the right side of the fourth unit, and the second card 47 is in turn electrically connected to the second sampling block section. When the first card 45 and the second card 47 are mated, the first sampling group segment can be electrically connected to the second sampling group segment.

In the present embodiment, the multi-pin socket 21 is provided on one side of the housing 14 in the longitudinal direction. For example, as shown in fig. 3, a multi-pin socket 21 is provided on the right side of the housing 14. Further, the multi-pin socket 21 is electrically connected to the plurality of sampling assemblies 19 so that the respective voltage signals can be transmitted to the signal pins of the multi-pin socket 21. Specifically, the multi-pin socket 21 is electrically connected to one end of one of the sampling group segments. For example, as shown in fig. 3, the multi-pin socket 21 is electrically connected to the bus bar 31 on the right side of the second unit, and the first plug-in 45 is electrically connected to the first sampling group section and the second sampling group section, so that the voltage signals collected by the first sampling group section and the second sampling group section can be transmitted to the signal pins of the multi-pin socket 21.

Further, the power battery module of this application embodiment still includes: and the temperature measuring assembly 49 is used for measuring a temperature signal in the battery cell unit 15. For example, as shown in FIG. 1, temperature measuring assembly 49 is disposed on the second unit and the third unit. The temperature sensing assembly 49 is electrically connected to the sampling assembly 19 to enable the transmission of temperature signals to the signal pins of the multi-pin socket 21.

Further, the multi-pin socket 21 is electrically connected to the battery management system through the signal pin, so that the voltage signal can be transmitted to the battery management system through the signal pin. The voltage across each cell 17 can thus be monitored by the battery management system.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter disclosed herein is not intended to forego the subject matter 13 nor should the applicant be construed as having considered such subject matter as part of the disclosed subject matter.

Claims

1. A power battery module, its characterized in that, it includes:

a housing;

a battery pack disposed within the housing; the battery comprises a plurality of battery cell units which are arranged in an array in the length direction and the width direction; the battery cell unit comprises a plurality of battery cells which are sequentially stacked along the height direction of the battery pack;

a sampling mechanism disposed within the housing; comprises a plurality of sampling components; the plurality of sampling assemblies correspond to the plurality of cell units; the sampling assembly is used for acquiring voltage signals of the electric cores in the corresponding electric core units;

a multi-pin socket provided at one side of the housing in a length direction; and the sampling assemblies are electrically connected so that each voltage signal can be transmitted to the signal pin of the multi-pin socket.

2. The power battery module of claim 1, wherein the cell has a positive plate and a negative plate arranged oppositely; the battery pack further comprises a first integrated cover plate and a second integrated cover plate which are arranged on the opposite sides of the battery cell unit along the length direction of the battery cell; and the first integrated cover plate and the second integrated cover plate are respectively provided with a bus bar which is electrically connected with the positive pole piece and/or the negative pole piece, so that the electric cores in the electric core unit can be connected in series and in parallel through the bus bars.

3. The power battery module of claim 2, wherein the sampling assembly comprises a flexible circuit board disposed on the corresponding cell unit; the flexible circuit board is electrically connected with the busbars which realize the series and parallel connection of the corresponding battery cell units so as to collect the voltage signals of the battery cells in the corresponding battery cell units.

4. The power battery module as recited in claim 3, wherein the sampling assembly further comprises a first sampling sheet and a second sampling sheet respectively disposed on the first integrated cover plate and the second integrated cover plate, one end of the first sampling sheet is welded to the bus bar on the first integrated cover plate, and the other end of the first sampling sheet is welded to one end of the flexible circuit board; one end of the second sampling sheet is welded with the bus bar on the second integrated cover plate, and the other end of the second sampling sheet is welded with the other end of the flexible circuit board.

5. The power battery module of claim 1, further comprising: a plurality of adapters; the adapter piece is used for electrically connecting the sampling assemblies adjacent to each other along the length direction of the battery pack so as to enable the sampling assemblies to form a plurality of sampling group sections without electric connection; the multi-pin socket is electrically connected with one end of one of the sampling group sections.

6. The power battery module of claim 5, further comprising: the plug connector comprises a first plug connector and a second plug connector which are in plug fit; the first plug-in unit is electrically connected with one of the sampling group sections, the second plug-in unit is electrically connected with the other sampling group section, so that when the first plug-in unit and the second plug-in unit are in plug fit, the other sampling group section can be electrically connected with one of the sampling group sections.

7. The power battery module of claim 1, further comprising: and the temperature measuring assembly is used for measuring temperature signals in the battery cell unit and is electrically connected with the sampling assembly so that the temperature signals can be transmitted to the signal pins of the multi-pin socket.

8. The power battery module as recited in claim 1, wherein the multi-pin socket is electrically connected to a battery management system via the signal pin, such that the voltage signal can be transmitted to the battery management system via the signal pin.