WO2023060839A1

WO2023060839A1 - Battery module and energy storage power supply

Info

Publication number: WO2023060839A1
Application number: PCT/CN2022/081477
Authority: WO
Inventors: 尹相柱; 黄小杰; 雷健华
Original assignee: 深圳市德兰明海科技有限公司
Priority date: 2021-10-14
Filing date: 2022-03-17
Publication date: 2023-04-20
Also published as: CN113644373A; CN113644373B

Abstract

The embodiments of the present application relate to the technical field of batteries. Disclosed are a battery module and an energy storage power supply. The battery module comprises a first battery unit, which comprises: a first casing provided with a cavity; a plurality of first battery cells accommodated in the cavity and arranged in an array, wherein two adjacent rows of first battery cells are arranged in a staggered manner; a first conductive assembly arranged on the first casing, wherein the first conductive assembly is electrically connected to one end of each of the plurality of first battery cells; and a second conductive assembly arranged on the first casing, wherein the second conductive assembly is electrically connected to the other end of each of the plurality of first battery cells. In this way, the first battery cells in the embodiments of the present application are arranged in the staggered manner, thereby increasing the space for heat dissipation in the first battery cells and improving the heat dissipation effect of same.

Description

A battery module and energy storage power supply

This application claims the priority of the Chinese patent application filed on October 14, 2021 with the application number 202111199552.6 entitled "A Battery Module and Energy Storage Power Supply" at the China Patent Office, the entire contents of which are incorporated by reference in this application middle.

technical field

The embodiments of the present application relate to the technical field of energy storage power supply, and in particular to a battery module and an energy storage power supply.

Background technique

With the continuous development of industrial modernization, the field of new energy technology has attracted more and more attention from all walks of life. Therefore, the application field of lithium batteries as a representative of new energy is also continuously expanding, and there are more and more related products. , The use of lithium batteries is becoming more and more complex, and the requirements for battery power are getting higher and higher. In order to meet the requirement of high power, battery modules appear on the market.

In the process of realizing the embodiment of the present application, the inventors found that the battery cells in the battery module generate serious heat and the heating is uneven among the cells, which affects the life of the cells, and in extreme cases, it is easy to catch fire and cause potential safety hazards.

application content

In order to solve the above technical problems, the embodiment of the present application provides a battery module and an energy storage power supply. The battery module has a better heat dissipation effect and a longer service life.

A technical solution adopted by the embodiments of the present application to solve the above-mentioned technical problems: On the one hand, a battery module is provided, including a first battery unit, and the first battery unit includes: a first housing provided with a cavity; several first The electric core, the plurality of first electric cores are housed in the cavity, and the plurality of first electric cores are arranged in an array, wherein the first electric cores in two adjacent rows are misplaced; the first conductive component, It is arranged on the first casing, and the first conductive component is electrically connected to one end of the plurality of first electric cores; the second conductive component is arranged on the first casing, and the second conductive component is connected to the first electric core. The other ends of the plurality of first electric cores are electrically connected.

Optionally, the first shell has a first area and a second area; the first cell includes a first cell unit and a first cell unit, and the first cell unit is located in the In the first area, the first two cell units are located in the second area, and the positive and negative poles of the first one cell unit are placed opposite to the positive and negative poles of the first two cell units; The second conductive component includes a first parallel conductive sheet and a second parallel conductive sheet, and the first parallel conductive sheet is respectively electrically connected to the first cell located in the first region, so that the cell located in the first The first and first cells in the second area are connected in parallel, and the second parallel conductive sheet is electrically connected to the first and second cells in the second area, so that the first and second cells in the second area are connected in parallel, so The first conductive component is electrically connected to the first one battery cell located in the first area and the first two battery cells located in the second area, so that the first one battery cell and the second battery cell in the first area The first and second cells in the second area are connected in series and parallel.

Optionally, the first shell includes an upper shell and a lower shell, the upper shell and the lower shell are fixed, and together surround the cavity and at least two heat dissipation ports; the upper shell The body has a plurality of first openings, and the lower case is provided with a plurality of second openings, and the two electrodes of the first one cell and the first two cells are respectively exposed to the first opening. A hole and a second opening; the first conductive component is arranged on the upper casing, and the first parallel conductive sheet and the second parallel conductive sheet are arranged on the lower casing.

Optionally, it also includes a second battery unit, the second battery unit includes a second casing, a plurality of second cells, a third conductive component and a fourth conductive component, and the plurality of second cells are accommodated in the first In the cavity of the second shell; the second shell has a third area and a fourth area; the second electric core includes a second one electric core unit and a second two electric core unit, and the second one electric core unit is located In the third area, the second two-cell unit is located in the fourth area, and the positive and negative poles of the second one-cell unit are opposite to the positive and negative poles of the second two-cell unit Placement; the third conductive component includes a third parallel conductive sheet and a fourth parallel conductive sheet, the fourth conductive assembly includes a fifth parallel conductive sheet and a sixth parallel conductive sheet, and the third parallel conductive sheet is located at the first parallel conductive sheet The first electrodes of the second one cell in the third area are electrically connected, and the fourth parallel conductive sheet is electrically connected with the second electrode of the second one cell in the third area, so that the first electrode in the third area The two first cells are connected in parallel; the fifth parallel conductive sheet is electrically connected to the first electrode of the second second cell located in the fourth area, and the sixth parallel conductive sheet is connected to the second second cell located in the fourth area. The second electrode is electrically connected so that the second and second batteries located in the fourth area are connected in parallel; the second battery unit and the first battery unit are stacked, and the third parallel conductive sheet is electrically conductive with the first parallel connection sheets are pasted and electrically connected, the second cell located in the third area is connected in series with the first cell located in the first area, the fifth parallel conductive sheet is bonded to the second parallel conductive sheet and Electrically connected, the second two cells located in the fourth area are connected in series with the first two cells located in the second area.

Optionally, the number of the second battery unit is multiple, and a plurality of the second battery units are stacked in sequence, and the third parallel connection of one of the second battery units among the two adjacent second battery units is The conductive sheet and the fifth parallel conductive sheet are respectively electrically connected to the fourth parallel conductive sheet and the sixth parallel conductive sheet of another second battery unit.

Optionally, the battery module further includes a first copper bar, a second copper bar, at least one third copper bar, and at least one fourth copper bar, one end of the first copper bar is electrically connected in parallel with the first The other end is connected to the third parallel conductive sheet; one end of the second copper bar is connected to the second parallel conductive sheet, and the other end is connected to the fifth parallel conductive sheet; the third copper bar One end of the row is connected to the fourth parallel conductive piece of a second battery unit, and the other end is connected to the third parallel conductive piece of the adjacent second battery unit; one end of the fourth copper bar is connected to a The sixth parallel conductive strip of the second battery unit is connected, and the other end is connected to the fifth parallel conductive strip of an adjacent second battery unit.

Optionally, the battery module includes a screw, a nut, a first clamping plate, a second clamping plate, a first insulating plate, and a second insulating plate; the first housing is provided with a first through hole, and the second housing is provided with a There is a second through hole; the first splint is provided with a first fixing hole, and the second splint is provided with a second fixing hole; one end of the screw rod passes through the first fixing hole, the second fixing hole of the first shell in sequence A through hole, at least one second through hole of the second shell and the second fixing hole are screwed to the nut, the first insulating plate is arranged between the first splint and the first conductive component, The second insulating plate is disposed between the second battery unit and the second clamping plate.

Optionally, when the first battery unit is stacked with at least one second battery unit, one of the lower case of the stacked battery unit and the upper case of the adjacent stacked battery unit There is a positioning hole, and the other is provided with a positioning post, and the positioning hole is adapted to the positioning post, and the adjacent battery units are positioned through the positioning hole and the positioning post and inserted and stacked.

Optionally, the positioning hole is provided with a first fool-proof structure, and the wall of the positioning column is provided with a second fool-proof structure, and the first fool-proof structure is adapted to the second fool-proof structure; When the first fool-proof structure matches the second fool-proof structure of the adjacent battery unit, the positioning post can be plugged into the positioning hole of the adjacent battery unit.

Another technical solution adopted by the embodiment of the present application to solve the above technical problem: on the other hand, an energy storage power supply is provided, including the above-mentioned battery module.

The beneficial effects of the embodiments of the present application are: different from the situation in the prior art, the embodiments of the present application provide a battery module including a first casing and a plurality of first cells, the first casing is provided with a cavity and a connection between the cavities The heat dissipation port, a plurality of first cells are housed in the cavity, and the plurality of first cells are arranged in an array, wherein the first cells in two adjacent rows are dislocated, and the gas entering from the heat dissipation port passes through the dislocation When there are two rows of first cells, the direction of the gas will change and surround more surfaces of each first cell, thereby taking away more heat from the first cells and improving the heat dissipation effect on the first cells, thus improving the battery mold. Group cooling effect.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Throughout the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn in actual scale.

Figure 1 is an exploded view of an embodiment of the battery module of the present application;

Fig. 2 is an exploded view of the first battery unit in the battery module embodiment of the present application;

Fig. 3 is an exploded view from another perspective of the first battery unit in the battery module embodiment of the present application;

Fig. 4 is a structural diagram of the first casing of the first battery unit in the battery module embodiment of the present application;

Fig. 5 is a partial exploded view of the second battery unit in the battery module embodiment of the present application;

Fig. 6 is a partially enlarged view of the structure A of the first battery unit case and the structure B of the second battery unit case in the battery module embodiment of the present application;

Fig. 7 is an enlarged view of part of the structure of the second battery unit case in the battery module embodiment of the present application;

Fig. 8 is a schematic diagram of the overall current flow in the battery module embodiment of the present application;

Fig. 9 is a schematic diagram of the positions of several copper bars in the battery module embodiment of the present application;

Fig. 10 is a structural view of the first splint and the second splint in the battery module embodiment of the present application.

Detailed ways

In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is said to be "fixed" to another element, it may be directly on the other element, or there may be one or more intervening elements therebetween. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal" etc. used in this specification is based on the orientation or positional relationship shown in the drawings, It is only for the purpose of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of this application. The terms used in the description of the present application are only for the purpose of describing specific embodiments, and are not used to limit the present application. The term "and/or" used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features involved in different embodiments of the present application described below may be combined with each other as long as they do not constitute a conflict with each other.

Please refer to FIG. 1 , the battery module 1 includes a first battery unit 10 , several second battery units 20 , a first splint 60 , a second splint 70 , a first insulating plate 80 , a second insulating plate 90 , a screw 40 , and a nut 50 and a plurality of copper bars 30, the plurality of second battery units 20 are stacked in sequence, and adjacent to the plurality of second battery units 20 are electrically connected, and the first battery unit 10 is stacked on the plurality of second battery units 20 , and the first battery unit 10 is electrically connected to one of the second battery units 20, the first insulating plate 80 is located between the second clamping plate 70 and the first battery unit 10, the The second insulating plate 90 is located between the second battery unit 20 at the end and the second clamping plate 70 , and the screw 40 passes through the first clamping plate 60 , the first insulating plate 80 , and the second clamping plate 70 sequentially. A battery unit 10, the plurality of second battery units 20, the second insulating plate 90 and the second clamping plate 70 are fixed with the nut 50, so that the first battery unit 10 and the plurality of second battery units The two battery units 20 are fixed, the plurality of copper bars 30 are located on both sides between the first battery unit 10 and the plurality of second battery units 20, and the two ends of the copper bars are connected to the first battery unit respectively. The unit 10 is connected to the second battery unit 20, and two adjacent second battery units 20, so that the first battery unit 10 and the second battery unit 20, and the two adjacent second battery units 20 are fixed, wherein, The first insulating plate 80 is used to maintain insulation between the first battery unit 10 and the first clamping plate 60, and the second insulating plate 90 is used to separate the second battery unit 20 at the end from the first clamping plate 60. Insulation is maintained between the second clamping plates 70 . Wherein, the second battery unit 20 at the end is the second battery unit 20 farthest from the first battery unit 10 among the plurality of second battery units 20 .

For the above-mentioned first battery unit 10, as shown in FIG. 2-FIG. 4 and FIG. 14. Several first electric cores 12 are arranged in the first shell 11, and the first conductive components 13 and the second conductive components 14 are arranged outside the first shell 11, and the first conductive components 13 and the second conductive components 14 are respectively connected with several first conductive components. The electrodes at both ends of the battery cell 12 are connected to electrically connect several first battery cells 12 , wherein the second conductive component 14 is also used to electrically connect the second battery unit 20 adjacent to the first battery unit.

For the above-mentioned first casing 11 and several first electric cores 12, the first casing 11 includes an upper casing 113 and a lower casing 114, and the upper casing 113 and the lower casing 114 are fixed together to enclose a cavity and at least two The cooling vents 116, wherein at least two cooling vents 116 are respectively located on the two opposite side walls of the first housing 11, the outside gas can enter the cavity from one cooling vent 116, and then output from the other cooling vent 116, so as to realize the cooling in the cavity. The gas is exchanged with the outside gas to achieve heat dissipation. The upper housing 113 is provided with a plurality of first openings 1131 and a plurality of first limiting grooves 1132, a first opening 1131 communicates with a first limiting groove 1132, and the lower housing 114 is provided with a plurality of second openings 1141 communicates with a plurality of second limiting grooves 1142, a second opening 1141 communicates with a second limiting groove 1142, a plurality of first electric cores 12 are accommodated in the cavity, and one end of the first electric core 12 is accommodated in A first limiting groove 1132, the other end of which is accommodated in the second limiting groove 1142, the first limiting groove 1132 and the second limiting groove 1142 together limit the first cell 12, so that the first The electric core 12 can be better fixed in the first casing 11, and the positive and negative poles of the first electric core 12 are respectively exposed to the first opening 1131 and the second opening 1141, so that all The first electric core 12 can be directly electrically connected to the first conductive component 13 and the second conductive component 14 respectively. Several first electric cores 12 are separated from each other under the action of the first limiting groove 1132 and the second limiting groove 1142, and the distance between the outer surfaces of adjacent first electric cores 12 is preferably 1.5 mm, so that the The plurality of first battery cells 12 have sufficient space for heat dissipation.

The first shell 11 is provided with a first area 111 and a second area 112, wherein the first one cell 121 located in the first area 111, and the positive and negative poles of the first two cells 122 located in the second area 112 Orientation is opposite, for example: the negative electrode of the first cell 121 located in the first area 111 is exposed to the first opening 1131, the positive electrode is exposed to the second opening 1141, and the first and second cell 122 located in the second area 112 The negative electrode is exposed to the second opening 1141 , and the positive electrode is exposed to the first opening 1131 .

For the above-mentioned first conductive component 13, the first conductive component 13 is arranged at one end of the first housing 11, and the first conductive component 13 is connected with the first and one electric cores 121 of the first region 111 and the second region 112. The plurality of first and second cells 122 are electrically connected, so that the plurality of first and first cells 121 in the first region 111 and the plurality of first and second cells 122 in the second region 112 are electrically connected in parallel and then electrically connected in series. In some embodiments, both ends of the first conductive component 13 are further provided with a first bent portion 131 and a second bent portion 132, and the first bent portion 131 and the second bent portion 132 are both attached to the first The shell 11 is used for connecting with several copper bars 30 .

For the above-mentioned second conductive component 14, the second conductive component 14 includes a first parallel conductive piece 141 and a second parallel conductive piece 142, and the first parallel conductive piece 141 and the second parallel conductive piece 142 are respectively located in the first shell 11 On both sides of the other end, the first parallel conductive sheet 141 is electrically connected to the first and first cells 121 in the first region 111, so that the first and first cells 121 in the first region 111 can be connected in parallel, and the second parallel conductive sheet 142 It is electrically connected to several first and second electric cells 122 in the second area 112, so that several first and second electric cells 122 in the second area 112 can be connected in parallel. In some embodiments, the first parallel conductive sheet 141 is provided with a third bend part 1411, a fourth bent part 1421 is provided at one end of the second parallel conductive piece 142, and the third bent part 1411 and the fourth bent part 1421 are attached to the first housing 11 for connecting with several copper bars 30.

Since the first battery cell 121 located in the first area 111 in the first battery unit 10 is connected in parallel, the first battery cell 122 located in the second area 112 in the second battery unit 20 is connected in parallel, and the first battery cell 122 located in the first area 111 is connected in parallel. One battery cell 121 is connected in series with the first two battery cells 122 located in the second area 112 in parallel, so that the current flow direction of the first one battery cell 121 located in the first area 111 remains consistent, and the first two battery cells located in the second area 112 The current flow direction of the battery cell 122 is consistent, and the current flow direction in the first battery unit 10 is U-shaped.

For the aforementioned second battery unit 20 , as shown in FIGS. 5-7 , the second battery unit 20 includes a second casing 21 , a plurality of second battery cells 22 , a third conductive component 23 , and a fourth conductive component 24 . Several second electric cores 22 are contained in the second housing 21, and the third conductive component 23 and the fourth conductive component 24 are arranged outside the second housing 21, and the third conductive component 23 and the fourth conductive component 24 are respectively connected with the second The battery cell 22 is electrically connected, and the third conductive component 23 and the fourth conductive component 24 are used to electrically connect with the second conductive component 14 , so that the second battery unit 20 is electrically connected with the first battery unit 10 .

For the above-mentioned second casing 21, the second casing 21 is provided with a third area 211 and a fourth area 212, the second one cell 221 located in the third area 211 and the second two cells located in the fourth area 212. The positive and negative poles of the battery cell 222 face opposite directions.

For the above-mentioned third conductive component 23, the third conductive component 23 includes a third parallel conductive piece 231 and a fourth parallel conductive piece 232, the third parallel conductive piece 231 is arranged at one end of the second shell 21, and is accommodated in the first The first electrodes of the second first cells 221 in the third area 211 are electrically connected, and the third parallel conductive sheet 231 contacts the first parallel conductive sheet 141 back to back to form an electrical connection, so that the plurality of second first electric cells 221 in the third area 211 It is connected in series with a plurality of first and first cells 121 in the first area 111, and the fourth parallel conductive sheet 232 is arranged at the other end of the second casing 21, and is connected with the second of the plurality of second and one cells 221 accommodated in the third area 211. The electrodes are electrically connected, one end of the third parallel conductive sheet 231 is provided with a fifth bent portion 2311, one end of the fourth parallel conductive sheet 232 is provided with a sixth bent portion 2321, the fifth bent portion 2311 and the sixth bent portion 2321 are both Fit the second shell 21 for connection with several copper bars 30 .

For the above-mentioned fourth conductive component 24, the fourth conductive component 24 includes a fifth parallel conductive piece 241 and a sixth parallel conductive piece 242, the fifth parallel conductive piece 241 is arranged at one end of the second housing 21, and is accommodated in the second shell 21. The second electrodes of the second and second cells 222 in the four regions 212 are electrically connected, and the fifth parallel conductive sheet 241 contacts the second parallel conductive sheet 142 back to back to form an electrical connection, so that the plurality of second and second cells 222 in the fourth region 212 It is connected in series with several first and second electric cells 122 in the second area 112, and the sixth parallel conductive sheet 242 is arranged at the other end of the second casing 21, and is connected with the first and second electric cells 222 in the fourth area 212. The two electrodes are electrically connected, one end of the fifth parallel conductive sheet 241 is provided with a seventh bending portion 2411, one end of the sixth parallel conductive sheet 242 is provided with an eighth bending portion 2421, the seventh bending portion 2411 and the eighth bending portion 2421 are attached to the second shell 21 and are used to connect with several copper bars 30 .

In some embodiments, as shown in FIG. 8 , the number of second battery units 20 is multiple, and the plurality of second battery units 20 are stacked in sequence, and one of the two adjacent second battery units 20 is The third parallel conductive strip 231 and the fifth parallel conductive strip 241 of the second battery unit 20 are electrically connected to the fourth parallel conductive strip 232 and the sixth parallel conductive strip 242 of another second battery unit 20, so that adjacent Among the two second battery units 20, a number of second battery cells 222 in the fourth area 212 of a second battery unit 20 are connected in series with a number of second battery cells 222 in the fourth area 212 of the other second battery unit 20 , and, a number of second-one cells 221 in the third area 211 of a second battery unit 20 are connected in series with a number of second-one cells 221 in the third area 211 of another second battery unit 20, so that adjacent batteries The parallel conductive sheets of the units are directly connected in a back-to-back manner to be connected in series, so that the current direction of the first one cell 121 and several second one cells 221 placed in the same electrode direction in the battery module 1 is in a straight line. The current direction of the first and second cells 122 and several second and second cells 222 is also in-line, forming two in-line currents that are mutually balanced and flow in opposite directions, and then the two in-line currents are realized by the first conductive component 13 The current is connected in series, and the current flow direction of the entire battery module 1 is U-shaped.

The first casing 11 of the first battery unit 10 and the second casing 21 of the second battery unit 20 have the same structure, and the first casing 11 and the second casing 21 are provided with a fool-proof structure that cooperates with each other to prevent the battery cells from being installed in the wrong direction. resulting in a short circuit.

When the first battery unit 10 and at least one second battery unit 20 are stacked, one of the lower case of the stacked battery unit and the upper case of the adjacent stacked battery unit is provided with a positioning The other is provided with a positioning post, and the positioning hole is adapted to the positioning post, and the adjacent battery units are positioned through the positioning hole and the positioning post and inserted and stacked. In addition, the positioning hole is provided with a first fool-proof structure, and the wall of the positioning column is provided with a second fool-proof structure, and the first fool-proof structure is adapted to the second fool-proof structure; when the When the first fool-proof structure matches the second fool-proof structure of the adjacent battery unit, the positioning post can be plugged into the positioning hole of the adjacent battery unit. The foolproofing is performed through the positioning hole, the positioning post, the second foolproofing structure and the first foolproofing structure. In this embodiment, the first fool-proof structure is a groove, and the second fool-proof structure is a protrusion. It can be understood that: the first fool-proof structure and the second fool-proof structure can be other fool-proof structures with a single-directional matching relationship. stay structure.

Specifically, as shown in Figures 4-7, a first positioning hole 15 is also provided on the lower case 114 of the first case 11 of the first battery unit 10, and a first positioning hole 15 is provided on the upper case of the second case 21 of the second battery unit 20. There is a first positioning post 25 , and a second positioning hole 26 is provided on the lower shell of the second housing 21 . The first positioning hole 15 has the same structure as the second positioning hole 26 , and the first positioning column 25 is compatible with the first positioning hole 15 and the second positioning hole 26 . The first positioning post 25 is further provided with a second foolproof structure 251 , the first positioning hole 15 is provided with a first first foolproof structure 151 , and the second positioning hole 26 is provided with a second first foolproof structure 261 . The first and first fool-proof structures 151 have the same structure as the second and first fool-proof structures 261, and the second fool-proof structures 251 are the same as the first and first fool-proof structures 151 and the second and first fool-proof structures. 261 compatible.

When the first battery unit 10 and a plurality of second battery units 20 are stacked, the first positioning hole 15 on the first battery unit 10 is inserted into the first positioning post 25 of the second battery unit 20, and the second battery unit 20 The second positioning hole 26 on the top is inserted into the first positioning column 25 of the adjacent second battery unit 20, on the one hand, the two adjacent battery units can be accurately positioned and stacked, and on the other hand, it can prevent the battery units from being reversed. (It can also be called the up-down direction) reverse installation, that is, to prevent the upper case and the lower case of the battery unit from being turned upside down and to avoid the short circuit of the battery cell. In addition, the cooperation of the first and second fool-proof structures 251 on the first positioning post 25 with the first and first fool-proof structures 151 of the first positioning holes 15 and the second and first fool-proof structures 261 of the second positioning holes 26 , which can prevent the left and right directions of the battery unit from being reversed. In this embodiment, only one set of fool-proof structure is needed, that is, the positioning column provided with the second fool-proof structure cooperates with the positioning hole provided with the first fool-proof structure, and the battery unit can be fool-proofed in the up and down, left and right directions. , so that each battery unit can only be stacked in one direction.

In addition, indicating arrows can also be provided on the first casing 11 of the first battery unit 10 and the second casing 21 of the second battery unit 20 to further strengthen the guidance of the installation direction and avoid short circuit of the battery module 1 . For above-mentioned several copper bars 30, as shown in Figure 9, described several copper bars 30 comprise the first copper bar 31, the second copper bar 32, some third copper bars 33 and some fourth copper bars 34, the first copper bar 31 and the second copper bar 32 are respectively located on both sides of the first battery unit 10 and the second battery unit 20, one end of the first copper bar 31 is connected to the third bent portion 1411 of the first parallel conductive sheet 141, and the other end is connected to the third The fifth bending portion 2311 of the parallel conductive sheet 231 is connected, so that the current flowing through the first parallel conductive sheet 141 and the third parallel conductive sheet 231 can be shunted, and at the same time, it has the function of strengthening the first battery unit 10 and the For the connection of the second battery unit 20, one end of the second copper bar 32 is connected to the fourth bent portion 1421 of the second parallel conductive sheet 142, and the other end is connected to the seventh bent portion 2411 of the fifth parallel conductive sheet 241, so as to The current flowing through the second parallel conductive sheet 142 and the fifth parallel conductive sheet 241 can be shunted, and at the same time, it has the function of strengthening the connection between the first battery unit 10 and the second battery unit 20. One end of a third copper bar 33 It is connected to the sixth bent portion 2321 of the fourth parallel conductive sheet 232, and the other end is connected to the fifth bent portion 2311 of the third parallel conductive sheet 231 of another second battery unit 20, so that the flow passes through the fourth parallel conductive sheet 232 and the third parallel conductive piece 231 of another second battery unit 20 can shunt the current, and at the same time, it has the effect of strengthening the connection of the adjacent second battery unit 20. One end of a fourth copper bar 34 and the sixth parallel conductive piece 242 The eighth bending part 2421 is connected, and the other end is connected to the seventh bending part 2411 of the fifth parallel conductive piece 241 of another second battery unit 20, so that the flow passes through the sixth parallel conductive piece 242 and another second battery unit The current of the fifth parallel conductive sheet 241 of 20 can be shunted, and at the same time, it has the function of strengthening the connection of the adjacent second battery unit 20 .

As shown in Figures 3 and 5, the first housing 11 is also provided with a first through hole 115, and the second housing 21 is also provided with a second through hole 213, the first through hole 115 and the second through hole 213 A screw 40 passes through and connects the first battery unit 10 and at least one second battery unit 20 . In this embodiment, the first positioning hole 15 is arranged coaxially with the first through hole 115, and the first positioning post 25 is arranged coaxially with the second through hole 213, forming a coaxial through hole for all The screw 40 passes through. Through the fool-proof structure, the penetration of the screw rod 40 is realized, the structure of the whole battery module is rationally arranged, and the parts and volume are reduced. In other embodiments, the first positioning hole 15 and the first through hole 115, the first positioning post 25 and the second through hole 213 may be arranged with different axes.

As shown in Figures 1 and 10, for the above-mentioned first splint 60, second splint 70, screw 40 and nut 50, the first splint 60 is arranged on the side of the first shell 11 away from the second shell 21, and the second splint 70 is arranged on the side of the second housing 21 away from the first housing 11. When there are multiple second battery units 20, the second splint 70 is arranged on the second side of the second battery unit 20 farthest from the first battery unit 10. The shell 21 is away from the side of the first shell 11, the first clamping plate 60 is provided with a first fixing hole 61, and the second clamping plate 70 is provided with a second fixing hole 71, both the first fixing hole 61 and the second fixing hole 71 are used for supplying The screw rod 40 passes through and is screwed with the nut 50 , so that the first clamping plate 60 and the second clamping plate 70 clamp and fix the first battery unit 10 and the plurality of second battery units 20 .

In the embodiment of the present application, the service life of the battery cell is improved through the joint action of the two aspects. On the one hand, when the battery cells in two adjacent rows in each battery unit (including the first battery unit and multiple second battery units) are dislocated, the gas entering from the heat dissipation port will be released when the gas enters through the dislocated two rows of battery cells. The direction of the battery will change to surround more surfaces of the battery cells, thereby taking away more heat from the battery cells and improving the heat dissipation effect of the battery cells, thereby improving the heat dissipation effect of the battery module 1 and increasing the service life of the battery cells. On the other hand, the batteries in each battery unit (including the first battery unit and multiple second battery units) are divided into two groups of positive and negative poles, and the two groups of batteries in the same battery unit are connected in parallel through parallel conductive sheets. ; and then directly contact the parallel conductive sheets of the adjacent battery cells in a back-to-back manner to connect in series, so that the current direction of the cells placed in the same electrode direction in the battery module 1 is in a straight line, forming two mutually balanced The current flow of the battery module is U-shaped by the first conductive component, and the output internal resistance of a single battery cell is balanced, and the heat generation of each battery cell is reduced, thereby greatly reducing the heat generation of the entire battery module. heat, thereby further increasing the service life of the battery cell.

In addition, compared with placing the electrodes of all the cells in each battery unit with the same orientation, the battery module 1 of the present application can maintain the same output voltage, and the volume is reduced by half. At the same time, the total positive and negative outputs of the entire battery module are output from the same side, which is conducive to the wiring arrangement of the battery module and the connection with other components, reducing the use of wires and reducing the volume of the energy storage power supply.

The above is only the implementation of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process conversion made by using the specification and drawings of the application, or directly or indirectly used in other related technologies fields, are all included in the scope of patent protection of this application in the same way.

Claims

A battery module, characterized in that it includes: a first battery unit, and the first battery unit includes:

A first housing is provided with a cavity, and the first housing has a first area and a second area;

A plurality of first electric cores, the plurality of first electric cores are housed in the cavity, and the plurality of first electric cores are arranged in an array, and the first electric cores include a first one electric cell unit and a first two electric cell unit core unit, the first one cell unit is located in the first area, the first two cell units are located in the second area, the positive and negative poles of the first one cell unit are opposite to the The positive and negative poles of the first and second cell units are placed oppositely, wherein the first cells in two adjacent rows are misplaced;

a first conductive component, disposed on the first casing, and electrically connected to one end of the plurality of first electric cores;

a second conductive component, disposed on the first casing, and electrically connected to the other ends of the plurality of first electric cores;

A second battery unit, the second battery unit includes a second casing, a plurality of second cells, a third conductive component, and a fourth conductive component; the plurality of second cells are accommodated in the cavity of the second casing; Both the third conductive component and the fourth conductive component are arranged outside the second casing, and are respectively electrically connected to the plurality of second electric cores;

the second housing has a third region and a fourth region;

The second cell includes a second one cell unit and a second two cell unit, the second one cell unit is located in the third area, and the second two cell unit is located in the fourth In the region, the positive and negative poles of the second one cell unit are placed opposite to the positive and negative poles of the second two cell unit;

When the first battery unit is stacked with at least one second battery unit, one of the lower casing of the stacked battery unit and the upper casing of the adjacent stacked battery unit is provided with a positioning hole, The other is provided with a positioning column, the positioning hole is matched with the positioning column, and the adjacent battery units are positioned and plugged and stacked through the positioning hole and the positioning column, which can prevent the battery unit from moving up and down. Reverse installation; the positioning hole is provided with a first fool-proof structure, and the wall of the positioning column is provided with a second fool-proof structure, and the first fool-proof structure is matched with the second fool-proof structure to prevent the battery from The left and right direction of the unit is reversed; when the first fool-proof structure matches the second fool-proof structure of the adjacent battery unit, the positioning post can be plugged into the positioning hole of the adjacent battery unit.
The battery module according to claim 1, characterized in that,

The second conductive component includes a first parallel conductive sheet and a second parallel conductive sheet, and the first parallel conductive sheet is respectively electrically connected to the first cell located in the first region, so that the cell located in the first The first and first cells in the second area are connected in parallel, and the second parallel conductive sheet is electrically connected to the first and second cells in the second area, so that the first and second cells in the second area are connected in parallel, so The first conductive component is electrically connected to the first one battery cell located in the first area and the first two battery cells located in the second area, so that the first one battery cell and the second battery cell in the first area The first and second cells in the second area are connected in series and parallel.
The battery module according to claim 2, characterized in that,

The first shell includes an upper shell and a lower shell, the upper shell and the lower shell are fixed, and together surround the cavity and at least two heat dissipation ports;

The upper case has a plurality of first openings, the lower case is provided with a plurality of second openings, and the two electrodes of the first one cell and the first two cells are respectively exposed to a said first opening and a said second opening;

The first conductive component is arranged on the upper casing, and the first parallel conductive sheet and the second parallel conductive sheet are arranged on the lower casing.
The battery module according to claim 1, characterized in that,

The third conductive component includes a third parallel conductive sheet and a fourth parallel conductive sheet, the fourth conductive component includes a fifth parallel conductive sheet and a sixth parallel conductive sheet, and the third parallel conductive sheet is located in the third area. The first electrode of the second one battery cell is electrically connected, and the fourth parallel conductive sheet is electrically connected to the second electrode of the second one battery cell located in the third area, so that the second one battery cell located in the third area The cells are connected in parallel; the fifth parallel conductive sheet is electrically connected to the first electrode of the second second cell located in the fourth area, and the sixth parallel conductive sheet is connected to the second electrode of the second second cell located in the fourth area. The electrodes are electrically connected so that the second and second cells located in the fourth area are connected in parallel;

The second battery unit is stacked with the first battery unit, the third parallel conductive sheet is bonded to and electrically connected to the first parallel conductive sheet, and the second battery cell located in the third area is connected to the second battery cell located in the third area. The first and one cells in the first area are connected in series, the fifth parallel conductive sheet is bonded and electrically connected to the second parallel conductive sheet, and the second and second cells in the fourth area are connected to the second cell in the second area. The first and second batteries are connected in series.
The battery module according to claim 4, characterized in that,

The number of the second battery unit is multiple, and the plurality of second battery units are stacked in sequence, and the third parallel conductive piece of one of the second battery units in two adjacent second battery units and the first The five parallel conductive strips are respectively electrically connected to the fourth parallel conductive strip and the sixth parallel conductive strip of another second battery unit.
The battery module according to claim 5, characterized in that,

The battery module also includes a first copper bar, a second copper bar, at least one third copper bar and at least one fourth copper bar, one end of the first copper bar is connected to the first parallel conductive sheet, and the other One end is connected to the third parallel conductive sheet; one end of the second copper bar is connected to the second parallel conductive sheet, and the other end is connected to the fifth parallel conductive sheet; one end of the third copper bar is connected to the The fourth parallel conductive piece of a second battery unit is connected, and the other end is connected to the third parallel conductive piece of an adjacent second battery unit; one end of the fourth copper bar is connected to a second The sixth parallel conductive sheet of the battery cell is connected, and the other end is connected to the fifth parallel conductive sheet of the adjacent second battery cell.
The battery module according to claim 4, characterized in that,

The battery module includes a screw, a nut, a first splint, a second splint, a first insulating plate and a second insulating plate;

The first housing is provided with a first through hole, and the second housing is provided with a second through hole;

The first splint is provided with a first fixing hole, and the second splint is provided with a second fixing hole;

One end of the screw rod passes through the first fixing hole, the first through hole of the first housing, at least one second through hole of the second housing and the second fixing hole in sequence, and then is screwed to the nut, so that The first insulating plate is disposed between the first clamping plate and the first conductive component, and the second insulating plate is disposed between the second battery unit and the second clamping plate.
An energy storage power supply, characterized by comprising the battery module according to any one of claims 1-7.