CN217903398U - Battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and in particular to a battery device, the battery device comprising: the battery box comprises a box body, a wire harness plate assembly and a battery, wherein the box body is provided with a bottom plate; the wiring harness board assembly comprises an isolation board and a busbar, the isolation board is arranged on the bottom board, the busbar is arranged on the isolation board, and a battery accommodating groove is formed in one side, away from the bottom board, of the isolation board; the battery is arranged in the battery accommodating groove in the isolation plate, and the battery is electrically connected with the bus bar. The insulation of busbar and battery device box has been realized, is provided with the battery storage tank on the division board, and the at least part of battery is located the battery storage tank, can retrain the position of battery on the one hand, can practice thrift spare part with the division board as the battery support frame, simplifies the technology, and on the other hand battery can reduce battery device's height effectively in the direction of height part is located the division board.

Description

Battery device

Technical Field

The present disclosure relates to the field of battery technologies, and particularly, to a battery device.

Background

With the development and progress of technology, electric vehicles are increasingly used. A battery device is provided in an electric vehicle for storing electric energy and supplying energy to the electric vehicle. In a battery pack, a plurality of batteries are generally provided, and the plurality of batteries are electrically connected by a bus bar. In the battery device, a plurality of batteries are often disposed in a case, which is usually a metal case, so that insulation is required between the bus bar and the case.

It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

The purpose of this disclosure is to provide a battery pack, and then realize the insulation of busbar and battery box among the battery device.

The present disclosure provides a battery device, including:

a case having a bottom plate;

the wiring harness board assembly comprises an isolation board and a busbar, the isolation board is arranged on the bottom board, the busbar is arranged on the isolation board, and a battery accommodating groove is formed in one side, away from the bottom board, of the isolation board;

the battery, the battery is located battery storage tank on the division board to the battery is connected with the busbar electricity.

According to the battery device provided by the embodiment of the disclosure, the wiring harness board assembly is arranged on the bottom plate, the bottom of the box body is electrically connected, the isolation plate is provided with the battery accommodating groove, and at least part of the battery is positioned in the battery accommodating groove, so that the position of the battery can be restrained, the isolation plate is used as a battery support frame, parts can be saved, the process is simplified, and the part of the battery in the height direction is positioned in the isolation plate, so that the height of the battery device can be effectively reduced; in addition, by connecting the bus bar to the separator, insulation of the bus bar and the battery device case is achieved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It should be apparent that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived by those of ordinary skill in the art without inventive effort.

Fig. 1 is a schematic diagram of a battery device provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic view of a wiring harness board assembly provided by an exemplary embodiment of the present disclosure;

fig. 3 is a schematic view of another wiring harness panel assembly provided in an exemplary embodiment of the present disclosure;

fig. 4 is a schematic diagram of another battery device provided by an exemplary embodiment of the present disclosure;

fig. 5 is a schematic diagram of a battery provided in an exemplary embodiment of the present disclosure;

fig. 6 is a partially enlarged schematic view of a battery provided in an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic illustration of a buss bar provided by an exemplary embodiment of the present disclosure;

fig. 8 is a schematic view of another buss bar provided by an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless explicitly specified or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An exemplary embodiment of the present disclosure provides a battery device, as shown in fig. 1, including: a case 400, a harness board assembly 200, and a battery 100, the case 400 having a bottom plate 410; the wire harness board assembly 200 comprises a partition board 220 and a bus bar 210, wherein the partition board 220 is arranged on a bottom plate 410, the bus bar 210 is arranged on the partition board 220, and a battery accommodating groove 223 is formed in one side, away from the bottom plate 410, of the partition board 220; the battery 100 is provided in the battery receiving groove 223 on the partition plate 220, and the battery 100 and the bus bar 210 are electrically connected.

The battery device provided by the embodiment of the disclosure, by connecting the bus bar 210 to the isolation plate 220, the insulation of the bus bar 210 and the battery device box 400 is realized, by arranging the wiring harness board assembly on the bottom plate, the electrical connection is realized at the bottom of the box, and the battery accommodating groove 223 is arranged on the isolation plate 220, at least part of the battery 100 is located in the battery accommodating groove 223, on one hand, the position of the battery 100 can be restrained, the isolation plate 220 is used as a support frame for the battery 100, parts can be saved, the process is simplified, on the other hand, the battery 100 is partially located in the isolation plate 220 in the height direction, and the height of the battery device can be effectively reduced.

The following will explain each part of the battery device provided by the embodiment of the present disclosure in detail:

the wire harness board assembly 200 includes a partition plate 220 and a bus bar 210, the partition plate 220 is provided on the bottom plate 410, the bus bar 210 is provided on the partition plate 220, and a battery accommodating groove 223 is provided on a side of the partition plate 220 away from the bottom plate 410.

As shown in fig. 2 and 3, the partition plate 220 includes a plate main body 221 and a frame 222, the plate main body 221 is provided with a battery receiving groove 223, and the frame 222 is connected to the plate main body 221 to form a frame enclosing the battery 100 at a side of the plate main body 221 where the battery receiving groove 223 is provided.

The plate body 221 may be a flat plate structure, and the battery receiving groove 223 may be a blind hole formed in the plate body 221. When the battery 100 is a cylindrical battery 100, the battery receiving groove 223 is a circular hole, and the diameter of the battery receiving groove 223 is slightly larger than that of the battery 100. The plate main body 221 is provided with a plurality of battery receiving grooves 223, and the number of the battery receiving grooves 223 on the plate main body 221 may be the same as the number of the batteries 100 in the battery device.

For example, the plate body 221 may be a rectangular flat plate. On this basis, the frame 222 includes a first plate 2221, a second plate 2222, a third plate 2223, and a fourth plate 2224 connected end to end, and the first plate 2221, the second plate 2222, the third plate 2223, and the fourth plate 2224 are respectively connected to one edge of the plate main body 221. The battery 100 enclosure frame is formed by the frame 222 and the plate main body 221, the battery 100 enclosure frame is used for restraining the battery 100, and the enclosure frame is positioned between the battery 100 and the case 400, so that the insulating performance between the battery 100 and the case 400 can be improved.

In the disclosed embodiment, the plate body 221 and the bezel 222 may be a unitary structure. The surrounding frame may form the frame 222 by bending the edge of the plate main body 221 toward the side where the battery 100 is placed. For example, a first side of the plate body 221 is bent to form a first plate 2221, a second side of the plate body 221 is bent to form a second plate 2222, a third side of the plate body 221 is bent to form a third plate 2223, and a fourth side of the plate body 221 is bent to form a fourth plate 2224. After bending, the first plate 2221, the second plate 2222, the third plate 2223, and the fourth plate 2224 are connected at one time. Of course, in practical applications, the plate main body 221 and the frame 222 may also be a split structure, and the embodiment of the disclosure is not limited thereto.

Further, the isolation plate 220 provided by the embodiment of the present disclosure may further include an extension portion, where the extension portion is disposed on the frame 222, and the extension portion is used for connecting to the box 400 of the battery device. The extending portion may be disposed at an end of the frame 222 away from the plate main body 221, and the extending portion extends outward. The extension may be fixedly coupled with the case 400 to fix the relative positions of the case 400 and the battery 100. For example, the extension and the case 400 may be coupled by bolts.

Wherein the extension may be formed by flanging the top of the rim 222. When the bezel 222 includes a first plate 2221, a second plate 2222, a third plate 2223, and a fourth plate 2224, an extension may be provided at the top of one or more of the first plate, the second plate 2222, the third plate 2223, and the fourth plate 2224.

In the embodiment of the present disclosure, the material of the isolation plate 220 is an insulating material, for example, the material of the isolation plate 220 may be plastic, rubber, resin, or ceramic.

The bus bar 210 is embedded in the plate body 221, and the bus bar 210 and the bottom plate 410 have a predetermined distance to insulate the bus bar 210 and the bottom plate 410. For example, the bus bar 210 and the isolation plate 220 are integrally formed by injection molding, and the bus bar 210 is wrapped in the isolation plate 220. Alternatively, a receiving portion may be formed in the panel main body 221 by machining, the bus bar 210 may be mounted in the receiving portion, and when the bus bar 210 is mounted in the receiving portion, the bus bar 210 is positioned inside the panel main body 221, the upper surface of the bus bar 210 is lower than the upper surface of the panel main body 221, and the lower surface of the bus bar 210 is higher than the lower surface of the panel main body 221.

The plate main body 221 is provided with a pressure relief channel 224, the pressure relief channel 224 is communicated with the battery accommodating groove 223, and the pressure relief channel 224 is used for guiding out liquid and gas ejected from the battery 100 when the battery 100 is exploded due to thermal runaway. The pressure relief channel 224 may be disposed on a side of the plate body 221 away from the battery 100, and may discharge heat to the case and be discharged through an explosion-proof valve of the case. In practical applications, the pressure relief channel 224 may also be disposed on a side of the plate body 221 where the battery 100 is disposed, and the embodiment of the disclosure is not limited thereto.

As shown in fig. 7 and 8, the bus bar 210 may include a first bus part 211, a main body part 213, and a second bus part 212, the first and second bus parts 211 and 212 being connected to the main body part 213, respectively, the first bus part 211 for connecting the poles 20 of the batteries 100, and the second bus part 212 for connecting the battery cases 10. In the busbar 210, a first bus portion 211 connects the poles 20 of the first battery, and a second bus portion 212 connects the housings of the second battery, which are two different batteries 100 in the battery device.

The separator 220 has a receiving portion for receiving the bus bar on a side thereof away from the battery 100. As an example, a first accommodating portion and a second accommodating portion are disposed on a side of the separating plate 220 away from the battery 100, the first converging portion 211 is disposed in the first accommodating portion, and the second converging portion 212 is disposed in the second accommodating portion.

The depth of the receiving portion in the partition plate 220 is greater than the thickness of the bus bar 210, that is, the bottom surface of the bus bar 210 is higher than the bottom surface of the partition plate 220. The depth of the first accommodating portion is greater than the thickness of the first converging portion 211, and the depth of the second accommodating portion is greater than the thickness of the second converging portion 212. The depth of the receiving portion in the partition plate 220 is greater than the thickness of the bus bar 210, and the insulating property of the bus bar and the bottom plate can be ensured.

The pressure relief channel 224 is disposed on a side of the first receiving portion away from the second receiving portion. The pressure relief passage 224 extends from the battery receiving groove 223 to the edge of the partition plate 220. For example, the pressure discharge path 224 is connected to at least one battery receiving groove 223, and the pressure discharge path 224 extends to an edge where a long side of the separator 220 is located.

In the embodiment of the present disclosure, the pole 20 of the battery 100 is the positive electrode of the battery 100, the negative electrode of the battery 100 is the battery case 10, that is, the first bus bar portion 211 is connected to the positive electrode of the battery 100, and the second bus bar portion 212 is connected to the negative electrode of the battery 100.

The first bus portion 211 includes a connection region 2111 and a weak region 2112, and the strength of the weak region 2112 is smaller than that of the connection region 2111. The connection region 2111 is used for connecting the pole post 20, for example, the connection region 2111 may be welded to the pole post 20. Weakened region 2112 forms a pressure relief channel after thermal runaway inside battery 100.

In one possible embodiment of the present disclosure, the weak region 2112 is a through hole disposed on the first bus bar portion 211. That is, the weak region 2112 may be formed by processing a through hole on the first bus bar portion 211. The through hole may correspond to the explosion-proof area 302 of the explosion-proof valve 30, and the size of the through hole may be greater than or equal to the size of the explosion-proof area 302 of the explosion-proof valve 30. The projection of the area of weakness 2112 onto the explosion-proof valve 30 coincides with the area of explosion-proof 302, or the projection of the area of weakness 2112 onto the explosion-proof valve 30 covers the area of explosion-proof 302.

In another possible embodiment of the present disclosure, in the weak region 2112, at least the edge of the weak region 2112 has a thickness smaller than that of the connection region 2111. That is, the weak region 2112 may be obtained by thinning a corresponding region on the first bus portion 211. When the first bus portion 211 is thinned, the entire region of the weak region 2112 of the first bus portion 211 may be thinned. Or thinning the first bus bar portion 211 may be thinning the edge of the weakened region 2112, forming an annular thinned region. The annular thinned area and the area inside the annular thinned area form a weakened area 2112.

The first bus part 211 may be connected to one end of the body part 213, and the second bus part 212 is connected to the other end of the body part 213. The second bus bar part 212 may be welded to the battery case 10, for example, the second bus bar part 212 may be connected to a surface of the battery case 10 where the terminal 20 is disposed, so as to implement one surface dual electrode of the battery 100. In the embodiment of the present disclosure, the electrode post 20 may be a positive electrode of the battery 100, the battery case 10 is a negative electrode of the battery 100, and the batteries 100 are connected through the first bus portion 211 and the second bus portion 212 of the bus bar 210, respectively, so that the plurality of batteries 100 can be connected in series.

It is understood that the bus bar 210 may also be used for parallel connection of a plurality of batteries 100 in the embodiment of the present disclosure. For example, the bus bar 210 may include a main body 213 and a plurality of first bus portions 211, the plurality of first bus portions 211 are respectively connected to the poles 20, and each first bus portion 211 is correspondingly connected to one pole 20 of the battery 100, so as to implement parallel connection of the poles 20 of the plurality of batteries 100.

In the embodiment of the present disclosure, the first bus bar portion 211 and the second bus bar portion 212 may be disposed in the battery receiving groove 223 on the plate main body 221, and the first bus bar portion 211 and the second bus bar portion 212 in the battery receiving groove 223 are insulated. Of the first bus portion 211 and the second bus portion 212 in the same battery receiving groove 223, the first bus portion 211 is a first bus portion 211 of a first bus bar, and the second bus portion 212 is a second bus portion 212 of a second bus bar. That is, the first bus bar portion 211 and the second bus bar portion 212 in the battery accommodating groove 223 are provided in different bus bars 210.

The isolation plate 220 is provided with an isolation rib located between the first bus bar 211 and the second bus bar 212 connected to the same battery 100, so as to insulate the first bus bar 211 and the second bus bar 212 connected to the same battery 100.

On the side of the separator 220 where the battery 100 is disposed, the second bus part 212 and the first bus part 211 are exposed to the separator 220, so that the battery 100 connects the second bus part 212 and the first bus part 211. On the side of the separator 220 away from the battery 100, a first welding groove and a second welding groove are respectively provided, the first welding groove is provided in the first accommodating portion, the first welding groove exposes the first bus portion 211, the second welding groove is provided in the second accommodating portion, and the second welding groove exposes the second bus portion 212. Welding may be performed from the side of the separator 220 away from the battery 100.

The bus bar 210 may include a bus bar main body formed of the main body portion 213, the first bus bar portion 211, and the second bus bar portion 212, and a lead-out section 214 provided at an end of the bus bar main body. The lead-out section 214 extends toward a side of the busbar body away from the bottom plate 410, and the lead-out section 214 is used for realizing electrical connection (for example, series connection or parallel connection) between the battery 100 groups.

As shown in fig. 5 and 6, the battery 100 includes: the battery comprises a battery main body, a pole post 20 and an explosion-proof valve 30, wherein the pole post 20 is arranged on the battery main body, and the explosion-proof valve 30 is arranged on the pole post 20. The battery main body includes: the pole post 20 is arranged on the battery shell 10, the pole post 20 is provided with an opening area 202 and a functional area 201, and the opening area 202 is provided with a liquid injection hole 203; the explosion-proof valve 30 is provided in the opening area 202, and the explosion-proof valve 30 is connected to the pole 20. The battery cell 50 is disposed in the battery case 10, the current collecting disc 60 is disposed at one end of the battery cell 50 close to the pole 20, and the current collecting disc 60 is used to electrically connect the battery cell 50 and the pole 20. The terminal 20 of the battery 100 provided by the embodiment of the present disclosure is one electrode of the battery 100, and the battery case 10 is the other electrode of the battery 100. An adaptor 70 is provided at an end of the cell 50 remote from the current collecting plate 60, the adaptor 70 electrically connecting the cell 50 and the battery housing 10. The insulating member 40 is provided between the electrode post 20 and the battery case 10, and the insulating member 40 is used to insulate the electrode post 20 from the battery case 10.

Of course, in practical applications, in the battery provided in the embodiment of the present disclosure, the explosion-proof valve 30 may also be disposed at an end of the battery housing 10 away from the pole 20, which is not specifically limited in the embodiment of the present disclosure. The explosion-proof valve 30 can also be arranged at one end of the battery shell 10 far away from the pole 20, so that the battery is electrically connected and heat is discharged.

The battery case 10 serves to form the outer contour of the battery 100 and protect the battery 100. The battery case 10 has a holding cavity therein, the electric core 50, the current collecting disc 60 and the adaptor 70 are disposed in the holding cavity of the battery case 10, the pole 20 is disposed in the battery case 10, and a part of the pole 20 is disposed in the holding cavity and a part of the pole 20 is disposed outside the battery case 10.

The battery case 10 may include a cover plate 11 and a case member 12, and the terminal post 20 is provided on the cover plate 11; the housing member 12 has an opening to which the cover plate 11 is attached. For example, the cover plate 11 may be connected to the housing member 12 by welding or adhesive bonding.

The shell member 12 may include a shell body and an end plate provided at an end of the shell body remote from the cover plate 11. The housing body and the end plate may be a unitary structure, for example, the housing body and the end plate may be integrally formed by casting, sheet metal processing, or machining. Of course, in practical applications, the shell main body and the end plate may also be a split structure, and the embodiments of the present disclosure are not limited thereto.

For example, the battery 100 provided by the embodiment of the present disclosure may be a cylindrical battery 100. On this basis, the battery case 10 may be a hollow cylinder or an approximately hollow cylinder structure. The battery case 10 is a thin-walled structure, and the thickness of the thin wall of the battery case 10 may be the same or different at different positions. The cover plate 11 is a thin wall of one bottom surface of the hollow cylinder, and the shell member 12 may include a thin wall (end plate) of the other bottom surface of the hollow cylinder and a thin wall of the side surface of the hollow cylinder.

A mounting through hole may be provided on the cover plate 11, the post 20 is penetrated through the mounting through hole, and a sealing member may be provided at the mounting through hole, and the sealing member seals the mounting through hole and the post 20, preventing the electrolyte inside the battery 100 from leaking out of the mounting hole.

The material of the battery case 10 is a metal material, for example, the material of the battery case 10 may be steel, aluminum, copper, silver, or the like. In the battery case 10, the materials of the cap plate 11, the case main body, and the end plates may be the same, or the materials of the cap plate 11, the case main body, and the end plates may be different. The cover plate 11, the case main body, and the end plate may have the same thickness, or the cover plate 11, the case main body, and the end plate may have different thicknesses.

The battery cell 50 is disposed in the battery case 10, and an electrolyte passage is disposed on the battery cell 50, and the electrolyte passage is opposite to the electrolyte injection hole 203. For example, cell 50 is a cylindrical cell 50, and the electrolyte passage extends through cell 50.

Here, the battery cell 50 refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first and second electrodes may be interchanged.

The battery cell 50 is connected with the current collecting disc 60, and the current collecting disc 60 is connected with the pole 20, so that the battery cell 50 is electrically connected with the pole 20. The shape of the battery cell 50 may match the shape of the battery 100, for example, when the battery 100 is a cylindrical battery 100, the battery cell 50 may also have a cylindrical or approximately cylindrical structure.

The cell 50 may include a cell body and tabs (not shown) protruding from the end of the cell body, the tabs being used to connect with the current collecting tray 60. For example, a first tab and a second tab may be disposed on the cell body, the first tab is disposed at one end of the cell body, and the second tab is disposed at the other end of the cell body. The first tab may be a positive tab, the second tab may be a negative tab, the first tab is disposed at one end of the cell body close to the terminal 20, and the second tab is disposed at one end of the cell body away from the terminal 20. The first tab may be welded to the current collecting plate 60.

Specifically, the battery cell 50 provided in the embodiment of the present disclosure may be a winding battery cell 50, and the winding battery cell 50 is obtained by winding a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece.

Of course, in practical applications, the battery cell 50 may also be a laminated battery cell 50, and the embodiment of the present disclosure is not limited thereto, and the battery cell 50 has a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm piece disposed between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell 50.

In a possible embodiment, the tab near one end of the pole 20 is a positive tab, and the positive tab is connected to the pole 20, i.e. the pole 20 is a positive post. The negative electrode of the battery 100 may be implemented by the battery case 10, and the negative electrode tab may be electrically connected to the case of the battery 100, so that the battery case 10 made of a metal material serves as the negative electrode.

When the post 20 of the battery 100 is a first electrode of the battery 100 and the case of the battery 100 is a second electrode of the battery 100, the post 20 and the battery case 10 need to be insulated. The insulating member 40 is provided between the terminal post 20 and the battery case 10 to achieve insulation of the battery case 10 and the terminal post 20.

The terminal post 20 protrudes from the surface of the battery case 10. On this basis, the battery accommodating groove 223 includes a first groove section and a second groove section, the first groove section is located on one side of the second groove section close to the bottom plate, the first groove section is used for accommodating the portion of the terminal 20 protruding from the battery case 10, and the second groove section is used for accommodating the battery case 10.

The diameter of the first groove section may be smaller than that of the second groove section, that is, the battery accommodating groove 223 is a stepped hole. The junction of the first and second channel sections forms a support surface against which the battery housing 10 is clamped.

The case 400 is used to protect the battery 100 and the wiring harness board assembly 200, and an accommodating space is formed in the case 400, and the battery 100 and the wiring harness board assembly 200 can be disposed in the accommodating space. The case 400 has a bottom plate 410, and the harness board assembly 200 is mounted on the bottom plate 410, for example, the harness board assembly 200 may be adhered to the bottom plate 410 of the case 400. The plate main body 221 is adhered to the bottom plate 410, one side of the plate main body 221, which is provided with the battery accommodating groove 223, is far away from the bottom plate 410, and the battery 100 is arranged in the battery accommodating groove 223, that is, the wire harness board assembly 200 is arranged below the battery 100.

The case 400 may include an upper case and a lower case, which are coupled. For example, the upper case and the lower case are connected by bolts, or the upper case and the lower case are welded. The bottom surface of the lower case forms a bottom plate 410, that is, the wire harness plate assembly 200 is adhered to the lower case.

In the embodiment of the present disclosure, a plurality of batteries 100 and the wiring harness board assembly 200 are connected to form one battery 100 set, and one or more battery 100 sets may be included in the battery device, that is, one or more battery 100 sets may be disposed in the case 400. When a plurality of battery 100 sets are provided in the case 400, the plurality of battery 100 sets may be electrically connected through the lead-out section 214 of the bus bar 210.

Further, as shown in fig. 4, the battery device provided by the embodiment of the present disclosure may further include a cooling device 300, where the cooling device 300 is disposed on a side of the battery 100 away from the harness board assembly 200. By providing the cooling device 300 on the side of the battery 100 away from the wire harness board assembly 200, the cooling of the battery 100 is realized, and the side of the battery 100 away from the wire harness board assembly 200 (pole) has a flat surface, so that the contact area between the cooling device 300 and the battery 100 can be increased, and the improvement of the heat radiation performance of the battery device is facilitated.

The cooling device 300 may be a liquid cooling device, for example, the cooling device 300 is a liquid cooling plate. The liquid-cooled plate has at least one flat surface, and the flat surface of the liquid-cooled plate is in contact with the end surface of the battery 100. In the embodiment of the present disclosure, one liquid cooling plate may be disposed on one battery 100 set, that is, one wiring harness board assembly 200 corresponds to one liquid cooling plate, and the wiring harness board assembly 200 and the liquid cooling plate are disposed at two ends of the battery 100 set respectively. Or a plurality of battery groups 100 may share one liquid cooling plate, which is not specifically limited in the embodiments of the present disclosure.

It is understood that the cooling device 300 may also be other cooling devices 300 in the embodiments of the present disclosure, such as an air cooling device, and the embodiments of the present disclosure are not limited thereto.

The cooling device 300 is disposed on the side of the battery 100 away from the wire harness board assembly 200, and the explosion-proof valve 30 of the battery 100 is disposed on the side of the battery 100 toward the wire harness board assembly 200, resulting in that the end of the battery 100 toward the wire harness board assembly 200 is not flat, while the end of the battery 100 away from the wire harness board assembly 200 is a flat plane, so that disposing the cooling device 300 on the end of the battery 100 away from the wire harness board assembly 200 is beneficial to increasing the contact area between the battery housing 10 and the cooling device 300, thereby improving the heat dissipation efficiency.

Further, the battery device provided by the embodiment of the present disclosure may further include a signal collecting assembly, where the signal collecting assembly includes a circuit board and a signal collecting terminal, the circuit board is disposed on the frame 222, and the signal collecting terminal is connected to the circuit board and the bus bar 210.

Wherein, the signal acquisition terminal can be temperature acquisition module or humidity acquisition module etc.. The circuit board may be a flexible circuit board (FPC) or a Printed Circuit Board (PCB) or the like.

In addition, in the above embodiment, the battery 100 is taken as a cylindrical battery as an example for description, in practical applications, the battery 100 may be not only a cylindrical battery, but also a rectangular battery, and the like, and the embodiment of the present disclosure is not limited thereto.

According to the battery device provided by the embodiment of the disclosure, the bus bar 210 is connected to the isolation plate 220, so that the bus bar 210 is insulated from the battery device box 400, the isolation plate 220 is provided with the battery accommodating groove 223, at least part of the battery 100 is located in the battery accommodating groove 223, on one hand, the position of the battery 100 can be constrained, the isolation plate 220 is used as a support frame for the battery 100, parts can be saved, the process is simplified, on the other hand, the part of the battery 100 in the height direction is located in the isolation plate 220, and the height of the battery device can be effectively reduced.

The device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery is used for the electric vehicle, the battery device can be a battery pack which is installed on the electric vehicle and provides energy for the electric vehicle.

In practical application, the battery pack can be mounted on a frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modular battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (18)

1. A battery device, characterized in that the battery device comprises:

a case having a bottom plate;

the wiring harness board assembly comprises a separation board and a bus bar, the separation board is arranged on the bottom board, the bus bar is arranged on the separation board, and a battery accommodating groove is formed in one side, away from the bottom board, of the separation board;

the battery, the battery is located battery storage tank on the division board to the battery is connected with the busbar electricity.

2. The battery device of claim 1, wherein the battery comprises:

a battery case;

the utmost point post, utmost point post is located battery case, the battery is provided with the one end of utmost point post and locates the battery storage tank.

3. The battery device of claim 2, wherein the battery device further comprises:

and the cooling device is arranged on one side, far away from the pole, of the battery shell.

4. The battery device of claim 2, wherein the battery further comprises:

the explosion-proof valve is arranged on the pole;

the busbar is provided with a first confluence part, a weak area is arranged on the first confluence part, and at least part of the projection of the explosion-proof valve on the first confluence part is coincided with the weak area.

5. The battery device according to claim 4, wherein the post protrudes from the battery housing, the battery receiving groove comprises a first groove section and a second groove section, the first groove section is located on one side of the second groove section close to the bottom plate, the first groove section is used for receiving a portion of the post protruding from the battery housing, and the second groove section is used for receiving the battery housing.

6. The battery device according to claim 5, wherein a side of the separator away from the battery is provided with accommodating portions, the accommodating portions including a first accommodating portion and a second accommodating portion;

the busbar comprises a first confluence part and a second confluence part, the first confluence part is arranged in the first accommodating part, the second confluence part is arranged in the second accommodating part, the first confluence part is used for being electrically connected with the pole, and the second confluence part is used for being electrically connected with the battery shell.

7. The battery device according to claim 6, wherein the first accommodating portion has a depth greater than a thickness of the first bus bar portion, and the second accommodating portion has a depth greater than a thickness of the second bus bar portion.

8. The battery device according to claim 7, wherein an isolation rib is provided on the isolation plate, the isolation rib being located between the first bus bar portion and the second bus bar portion connected to the same battery to achieve insulation of the first bus bar portion and the second bus bar portion connected to the same battery.

9. The battery device according to claim 7, wherein a pressure relief channel is provided in the separator, and the pressure relief channel communicates with the battery receiving groove.

10. The battery device of claim 9, wherein the pressure relief channel is disposed on a side of the first receiving portion away from the second receiving portion.

11. The battery device according to claim 9, wherein the pressure relief channel extends from the battery receiving groove to an edge of the separator.

12. The battery device of claim 9, wherein the pressure relief channel is disposed on a side of the separator plate away from the battery.

13. The battery device according to claim 1, wherein the separator and the bus bar are integrally molded by injection molding.

14. The battery device according to claim 1, wherein the separator comprises:

the battery accommodating groove is formed in the plate main body;

and the frame is connected with the plate main body so as to form a battery enclosure frame at one side of the plate main body, which is provided with the battery accommodating groove.

15. The battery device of claim 14, wherein the battery device further comprises:

the signal acquisition assembly comprises a circuit board and a signal acquisition terminal, the circuit board is arranged on the frame, and the signal acquisition terminal is connected with the circuit board and the bus bar.

16. The battery device of claim 14, wherein the separator further comprises:

the extending part is arranged on the frame and used for being connected with the box body.

17. The battery device according to claim 1, wherein the bus bar includes:

a busbar body embedded in the barrier plate;

the leading-out section is arranged at the end part of the bus bar main body and extends towards one side of the bus bar main body, which is far away from the bottom plate.

18. The battery device of any of claims 1-17, wherein the battery is a cylindrical battery.

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