CN217983591U - Battery Packs and Vehicles - Google Patents

Abstract

The present disclosure relates to a battery pack and a vehicle, the battery pack comprising a plurality of cells, the cells comprising: a conductive housing having an accommodating space formed therein; the core body is accommodated and fixed in the accommodating space and comprises a pole core, a first tab and a second tab, wherein the first tab and the second tab are positioned on two opposite sides of the pole core, and the first tab is electrically connected with the conductive shell; the first pole is arranged outside the conductive shell and insulated from the conductive shell, and the second pole lug is electrically connected with the first pole; the battery cells are connected in series, and the first pole of one of any two battery cells connected in series is in electrical contact with the conductive shell of the other battery cell. Through above-mentioned technical scheme, the battery package that this disclosure provided can be convenient for maintain or change single electric core, has the characteristics that cost of maintenance is low.

Description

Battery Packs and Vehicles

technical field

The present disclosure relates to the technical field of batteries, and in particular, to a battery pack and a vehicle.

Background technique

In the battery pack, the electrical connection between the cells is usually achieved by laser welding the bus bar on the positive pole and the negative pole of the battery cell, and multiple cells are connected in series to form a battery pack for supplying The vehicle is powered.

However, the method of connecting the bus bar and the positive pole and negative pole of the battery cell by laser welding is difficult to operate, and when a battery cell in the battery pack fails or is damaged, it is difficult to repair or replace, and the An entire battery pack needs to be replaced, resulting in high repair costs.

Utility model content

The purpose of the first aspect of the present disclosure is to provide a battery pack, which can facilitate the maintenance or replacement of a single battery cell, and has the characteristics of low maintenance cost.

In order to achieve the above object, the present disclosure provides a battery pack, the battery pack includes a plurality of battery cells, and the battery cells include: a conductive shell, an accommodation space is formed inside the conductive shell; a core body, the core body Accommodated and fixed in the accommodating space, including a pole core and a first pole lug and a second pole lug located on opposite sides of the pole core, the first pole lug is electrically connected to the conductive shell; and A pole, the first pole is arranged on the outside of the conductive shell and is insulated from the conductive shell, and the second pole is electrically connected to the first pole; wherein, a plurality of the electric cores connected in series, the first pole of one of any two battery cells connected in series is in electrical contact with the conductive casing of the other.

Optionally, the cell further includes a second pole and a first elastic connector, the first elastic connector is electrically connected between the first pole and the second pole, and any phase is connected in series The second pole of one of the two electric cores is in electrical contact with the conductive casing of the other.

Optionally, the first elastic connector is configured as a spring, and one end of the first elastic connector is welded to the first pole, and the other end is welded to the second pole.

Optionally, the first tab is connected to the conductive shell by welding.

Optionally, the second tab is welded to the first pole.

Optionally, the battery pack further includes a plurality of conductive components, a plurality of the cells are arranged in a row, and a plurality of the cells in the same row are connected in series between two conductive components, and the conductive components It includes a first conductive sheet and a second elastic connecting piece, the second elastic connecting piece is electrically connected to the first conductive sheet, and is used to make electrical contact with the battery core, and the elastic force of the second elastic connecting piece is used to It is used to compress a plurality of said electric cores in the same row.

Optionally, the conductive assembly further includes a second conductive sheet, the second elastic connector is fixedly connected between the first conductive sheet and the second conductive sheet, and the second conductive sheet is connected to the second conductive sheet. The conductive shell or first pole of the cell is in electrical contact.

Optionally, the second elastic connector is configured as a spring, and one end of the second elastic connector is welded to the first conductive sheet, and the other end is welded to the second conductive sheet.

Optionally, the conductive casing is an aluminum casing or a steel casing.

According to the object of the second aspect of the present disclosure, a vehicle is provided, the vehicle includes the above-mentioned battery pack.

Through the above technical solution, in the battery pack provided by the present disclosure, a plurality of battery cells are connected in series, and each battery cell includes a conductive shell, a core body and a first pole, and the core body is accommodated and fixed inside the conductive shell, The first pole is arranged outside the conductive shell and is insulated from the conductive shell, wherein the first tab of the core is electrically connected to the conductive shell, and the second tab of the core is electrically connected to the first pole. In this way, the conductive shell One of the first poles is used as the positive pole of the core, the other is used as the negative pole of the core, and the first pole of one of the two electric cores connected in series is connected with the conductive shell Electrical contact, thereby realizing the electrical connection between multiple batteries. In this way, the electrical connection between the batteries can be realized through the electrical contact between the first pole and the conductive shell. Compared with the traditional electric The electrical connection between the core and the battery is realized by laser welding the bus bar. The battery pack provided in the present disclosure does not need special laser welding equipment to weld the bus bar to realize the electrical connection between the battery core and the battery core, which reduces the Laser welding process, and because the battery cells are electrically connected by contact, so in the case of damage or failure of individual battery cells in the battery pack provided by the present disclosure, the damaged or faulty battery cells can be directly After replacement, there is no need to replace the entire battery pack, which can greatly reduce maintenance costs.

Other features and advantages of the present disclosure will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the description, together with the following specific embodiments, are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the attached picture:

FIG. 1 is a schematic structural diagram of a battery pack provided by an embodiment of the present disclosure;

Fig. 2 is a schematic structural diagram of a battery cell in a battery pack provided by an embodiment of the present disclosure.

Explanation of reference signs

10-battery core; 101-conductive shell; 1021-first tab; 1022-second tab; 103-first pole; 104-first elastic connector; 105-second pole; 20-conductive component ; 201-the first conductive sheet; 202-the second elastic connector; 203-the second conductive sheet.

detailed description

Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

In the present disclosure, the orientation words "inner and outer" used refer to "inner and outer" with respect to the contours of the corresponding parts themselves, unless stated to the contrary. In addition, terms such as "first" and "second" used in the present disclosure are used to distinguish one element from another element, and do not have order or importance. Furthermore, in the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and should not be construed as limiting the present disclosure.

According to a specific embodiment of the present disclosure, a battery pack is provided. Referring to FIG. 1 to FIG. There is an accommodating space; the core, the core is accommodated and fixed in the accommodating space, including the pole core and the first pole lug 1021 and the second pole lug 1022 located on opposite sides of the pole core, the first pole lug 1021 and the conductive shell 101 Electrical connection; and the first pole 103, the first pole 103 is arranged outside the conductive shell 101 and insulated from the conductive shell 101, the second pole ear 1022 is electrically connected to the first pole 103; wherein, a plurality of electric cores 10 In series connection, the first pole 103 of one of any two battery cells 10 in series is in electrical contact with the conductive shell 101 of the other.

Through the above technical solution, in the battery pack provided by the present disclosure, a plurality of battery cells 10 are connected in series, and each battery cell 10 includes a conductive shell 101, a core body and a first pole 103, and the core body is accommodated and fixed in a conductive Inside the shell 101, the first pole 103 is arranged outside the conductive shell 101 and insulated from the conductive shell 101, wherein the first tab 1021 of the core is electrically connected to the conductive shell 101, and the second tab 1022 of the core is electrically connected to the conductive shell 101. The first pole 103 is electrically connected, so that one of the conductive shell 101 and the first pole 103 is used as the positive pole of the core, and the other is used as the negative pole of the core. The first pole 103 of one of them is in electrical contact with the conductive shell 101 of the other, thereby realizing the electrical connection between the plurality of electric cores 10, in this way, the electric core 10 and the electric core 10 pass through the second One pole 103 is in electrical contact with the conductive shell 101 to realize the electrical connection. Compared with the traditional method of realizing electrical connection between the battery cells 10 and the battery cells 10 through laser welding bus bars, the battery pack provided in the present disclosure does not Special laser welding equipment is required to weld the busbar to realize the electrical connection between the electric core 10 and the electric core 10, which reduces the laser welding process, and because the electric core 10 and the electric core 10 are electrically connected by contact, so in this It is disclosed that in the case of damage or failure of individual cells 10 in the provided battery pack, the damaged or faulty cells 10 can be directly replaced without replacing the entire battery pack, which can greatly reduce maintenance costs .

In the specific embodiment provided by the present disclosure, the battery cell 10 further includes a second pole 105 and a first elastic connector 104, and the first elastic connector 104 is electrically connected between the first pole 103 and the second pole 105 , the second pole 105 of one of any two battery cells 10 connected in series is in electrical contact with the conductive casing 101 of the other. Due to the elasticity of the first elastic connector 104, the elastic connection between the first pole 103 and the second pole 105 can be realized. When there is an assembly tolerance between the conductive shells 101 of one of them, the first elastic connector 104 can absorb the assembly tolerance, that is, the second pole 105 can adjust its attitude relative to the first pole 103 (that is, relative to the first pole 103 The direction and angle of inclination) are adjusted to make the second pole 105 closely contact with the conductive shell 101 connected in series, so as to ensure the reliability of the electrical connection between the two battery cells 10 connected in series.

Wherein, the first elastic connecting member 104 may be configured in any suitable manner. For example, in one embodiment, the first elastic connecting member 104 can be configured as a metal elastic sheet. In this case, one end of the first elastic connecting member 104 is welded to the first pole 103, and the other end is welded to the second pole. pole 105 , thereby realizing the elastic connection between the first pole 103 and the second pole 105 . In other embodiments, as shown in FIG. 2 , the first elastic connector 104 can be configured as a spring, and one end of the first elastic connector 104 is welded to the first pole 103, and the other end is welded to the second pole. 105 , thereby realizing the elastic connection between the first pole 103 and the second pole 105 . In addition, the number of the first elastic connecting member 104 can be any suitable design according to actual needs, such as one, two, three or four, etc., which is not specifically limited in the present disclosure.

In the specific implementation manner provided in the present disclosure, the first tab 1021 may be electrically connected to the conductive housing 101 in any suitable manner. In some embodiments, the first tab 1021 can be connected to the conductive housing 101 by welding, and the first tab 1021 can be fixedly connected to the conductive housing 101 by welding, and at the same time, the electrical connection between the first tab 1021 and the conductive housing 101 can be realized. connect. In other embodiments, the first tab 1021 can be fixedly connected to the conductive housing 101 through a conductive member such as a screw or a pin, and electrically connected to the conductive housing 101 through the conductive member, thereby realizing the connection between the first tab 1021 and the conductive housing 101. The connection is fixed, and at the same time, the electrical connection between the first tab 1021 and the conductive shell 101 is realized. In another embodiment, a metal shrapnel may also be provided between the first tab 1021 and the conductive housing 101, and one end of the metal shrapnel is welded or fastened to one of the first tab 1021 and the conductive housing 101. Components (such as bolts, screws, etc.) are fixed and conductively connected, and the other end of the metal elastic piece is in conductive contact with the other of the first tab 1021 and the conductive shell 101, thereby realizing the connection between the first tab 1021 and the conductive shell. 101 electrical connection between.

Similarly, in the specific implementation manners provided in the present disclosure, the second tab 1022 may also be electrically connected to the first pole 103 in any suitable manner. In some embodiments, the second tab 1022 can be connected to the first pole 103 by welding, and the second tab 1022 can be fixedly connected to the first pole 103 through welding, and at the same time, the connection between the second tab 1022 and the first pole 103 can be realized. Electrical connection of a pole 103 . In other embodiments, the second pole ear 1022 can be fixedly connected to the first pole 103 through conductive elements such as screws and pins. The fixed connection of the pole 103 can also realize the electrical connection between the second pole ear 1022 and the first pole 103 . In another embodiment, a metal shrapnel may also be provided between the second tab 1022 and the first pole 103, and one end of the metal shrapnel passes through one of the second tab 1022 and the first pole 103. Welding or fasteners (such as bolts, screws, etc.) are fixed and conductively connected, and the other end of the metal shrapnel is in conductive contact with the other of the second pole 1022 and the first pole 103, thereby realizing the second The electrical connection between the tab 1022 and the first pole 103 .

In the present disclosure, the first pole 103 may be insulated from the conductive shell 101 by an insulating member (not shown in the figure), the second pole 1022 is electrically connected to the first pole 103, and the second pole 1022 is connected to the conductive shell 101 insulation, where a gap can be set between the second tab 1022 and the conductive shell 101 to separate the second tab 1022 from the conductive shell 101, so as to realize the insulation of the second tab 1022 from the conductive shell 101, here In some cases, a part of the first pole 103 protrudes into the accommodation space to be electrically connected with the second pole 1022 . Of course, it is also possible to provide an insulating member between the second tab 1022 and the conductive shell 101 to prevent the second tab 1022 from contacting the conductive shell 101 , so as to achieve insulation between the second tab 1022 and the conductive shell 101 .

In the specific embodiment provided by the present disclosure, the battery pack further includes a plurality of conductive components 20 , the multiple cells 10 are arranged in a row, and the multiple cells 10 in the same row are connected in series between the two conductive components 20 . Wherein, the conductive component 20 can be configured in any suitable manner. Optionally, as shown in FIG. 1 , the conductive assembly 20 may include a first conductive sheet 201 and a second elastic connecting member 202, and the second elastic connecting member 202 is electrically connected to the first conductive sheet 201 and electrically connected to the cell 10. contact to realize electrical communication between the electric core 10 and the first conductive sheet 201, and the elastic force of the second elastic connector 202 is used to compress the multiple electric cores 10 in the same row, so as to promote the electric connection between the multiple electric cores 10 in the same row. The contact between the cores 10 is good, so that the positive and negative poles of multiple electric cores 10 are connected end-to-end to conduct electricity. Wherein, as shown in FIG. 1 , multiple rows of battery cells 10 are connected in series through conductive components 20, and the end of the previous row of battery cells 10 and the head end of the next row of battery cells 10 share a first conductive sheet 201. To realize the series connection between different rows of battery cells 10, it is of course also possible that the ends of the last row of battery cells 10 and the head ends of the next row of battery cells 10 are respectively electrically connected to the corresponding first conductive sheets 201, and the two The electrical connection between the two first conductive sheets 201 is realized through another conductive member. In addition, according to the arrangement of multiple rows of battery cells 10 , the second elastic connecting member 202 may be in electrical contact with the conductive shell 101 of the battery cells 10 or the second pole 105 .

In the specific embodiment provided by the present disclosure, in order to achieve reliable contact between the conductive component 20 and the battery cell 10, the conductive component 20 further includes a second conductive sheet 203, and the second elastic connecting member 202 is fixedly connected to the first conductive sheet 201. and the second conductive sheet 203, the second conductive sheet 203 is in electrical contact with the conductive shell 101 of the cell 10 or the first pole 103, because the second conductive sheet 203 is in contact with the conductive shell 101 of the cell 10 or the first pole 103 are in surface contact, thus ensuring reliable contact between the conductive component 20 and the battery core 10 . Moreover, since the second elastic connecting member 202 has elasticity, the elastic connection between the first conductive sheet 201 and the second conductive sheet 203 can be realized. In this way, when there is an assembly tolerance between the battery cell 10 and the conductive assembly 20, the second elastic connection The component 202 can absorb the assembly tolerance, that is, the second conductive sheet 203 can adjust its posture relative to the first conductive sheet 201 (that is, the direction and angle of inclination relative to the first conductive sheet 201), so as to adjust to the second conductive sheet 203 and the electrical connection. The core 10 is in close contact, so as to ensure the reliability of the electrical connection between the conductive component 20 and the battery core 10 .

Wherein, the second elastic connecting member 202 may be configured in any suitable manner. For example, in one embodiment, the second elastic connector 202 can be configured as a metal elastic sheet. In this case, one end of the second elastic connector 202 is welded to the first conductive sheet 201, and the other end is welded to the second conductive sheet. sheet 203, thereby realizing the elastic connection between the first conductive sheet 201 and the second conductive sheet 203. In other embodiments, as shown in FIG. 1, the second elastic connector 202 can be configured as a spring, and one end of the second elastic connector 202 is welded to the first conductive sheet 201, and the other end is welded to the second conductive sheet. 203 , thereby realizing the elastic connection between the first conductive sheet 201 and the second conductive sheet 203 . In addition, the number of the second elastic connecting member 202 can be any suitable design according to actual needs, such as one, two, three, or four, etc., which is not specifically limited in the present disclosure.

In the specific implementation manner provided in the present disclosure, the conductive housing 101 may be made of any conductive material. In one embodiment, the conductive casing 101 may be an aluminum casing, in this case, the first tab 1021 is a positive tab. In another embodiment, the conductive casing 101 may be a steel casing, in this case, the first tab 1021 is a negative tab.

According to the object of the second aspect of the present disclosure, a vehicle is provided, which includes the above-mentioned battery pack. The battery pack provided in the present disclosure also has the above-mentioned characteristics, and in order to avoid repetition, details are not repeated here.

The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure. These simple modifications all belong to the protection scope of the present disclosure.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner if there is no contradiction. The combination method will not be described separately.

In addition, various implementations of the present disclosure can be combined arbitrarily, as long as they do not violate the idea of the present disclosure, they should also be regarded as the content disclosed in the present disclosure.

Claims (10)

1. A battery pack, comprising a plurality of cells, the cells comprising:

a conductive housing having an accommodating space formed therein;

the core body is accommodated and fixed in the accommodating space and comprises a pole core, a first tab and a second tab, wherein the first tab and the second tab are positioned on two opposite sides of the pole core, and the first tab is electrically connected with the conductive shell; and

the first pole is arranged outside the conductive shell and insulated from the conductive shell, and the second pole lug is electrically connected with the first pole;

the battery cells are connected in series, and the first pole of one of any two battery cells connected in series is in electrical contact with the conductive shell of the other battery cell.

2. The battery pack of claim 1, wherein the cells further comprise a second pole and a first resilient connector electrically connected between the first pole and the second pole, the second pole of any two of the cells in series electrically contacting a conductive housing of the other.

3. The battery pack according to claim 2, wherein the first elastic connector is configured as a spring, and one end of the first elastic connector is welded to the first pole and the other end is welded to the second pole.

4. The battery pack of claim 1, wherein the first tab is welded to the conductive housing.

5. The battery pack of claim 1, wherein the second tab is welded to the first pole.

6. The battery pack of claim 1, further comprising a plurality of conductive assemblies, wherein the plurality of battery cells are arranged in a row, the plurality of battery cells in the same row are connected in series between two conductive assemblies, each conductive assembly comprises a first conductive sheet and a second elastic connecting member, the second elastic connecting member is electrically connected to the first conductive sheet and electrically contacted to the battery cells, and an elastic force of the second elastic connecting member is used for compressing the plurality of battery cells in the same row.

7. The battery pack of claim 6, wherein the conductive assembly further comprises a second conductive strip, the second elastic connector is fixedly connected between the first conductive strip and the second conductive strip, and the second conductive strip is in electrical contact with the conductive housing of the battery cell or the first terminal.

8. The battery pack of claim 7, wherein the second elastic connector is configured as a spring, and one end of the second elastic connector is welded to the first conductive tab and the other end is welded to the second conductive tab.

9. The battery pack of any one of claims 1-8, wherein the conductive housing is an aluminum housing or a steel housing.

10. A vehicle, characterized in that the vehicle comprises a battery pack according to any one of claims 1-9.

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