Battery pack and electric equipment

Abstract

The utility model relates to a battery pack and electric equipment, the battery pack comprises a box body, a battery pack, a heat exchange assembly and a conductive connecting piece, the battery pack comprises a plurality of single batteries, the single batteries are fixedly arranged in the box body, the heat exchange assembly is arranged in the box body and comprises a heat exchange plate used for carrying out heat exchange on the single batteries, and the conductive connecting piece is arranged on the heat exchange plate. And the conductive connecting piece is connected with the heat exchange plate and the box body. Therefore, the heat exchange plates are conductively connected with the box body through the conductive connecting pieces, so that when insulation between the battery monomers and the heat exchange plates fails, the heat exchange plates can conduct electricity to the box body through the conductive connecting pieces, and the risks that the heat exchange plates are electrified and electric leakage and even sparking possibly exist between the heat exchange plates are avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular, to a battery pack and an electrical device. Background Art

[0002] The battery cells of the battery pack require heat exchange plates for heat exchange treatment to reduce the risk of thermal runaway of the battery. In related technologies, adjacent heat exchange plates are usually connected by connecting tubes. Since the connecting tubes are usually made of non-conductive materials, when the insulation between the battery cells and the heat exchange plates fails, the heat exchange plates will be at risk of being electrified, and there may be a risk of leakage or even fire between multiple heat exchange plates. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery pack and an electrical device, wherein the battery pack can prevent the heat exchange plate from being charged, so as to at least partially solve the above technical problems.

[0004] In order to achieve the above-mentioned objectives, the first aspect of the present disclosure provides a battery pack, comprising: a box body, a battery pack, comprising a plurality of battery cells, wherein the battery cells are fixedly arranged in the box body, a heat exchange assembly, arranged in the box body, comprising a heat exchange plate for exchanging heat for the battery cells; and a conductive connector, wherein the conductive connector electrically connects the heat exchange plate and the box body.

[0005] Optionally, the conductive connecting member is a conductive foam and / or a metal bracket.

[0006] Optionally, there are one or more conductive connectors, and at least one conductive connector is connected to one side of the heat exchange plate in the first direction.

[0007] Optionally, the number of the conductive connectors is two, and the conductive connectors include a first conductive connector and a second conductive connector, and the first conductive connector and the second conductive connector are respectively arranged on two opposite sides of the heat exchange plate in the first direction.

[0008] Optionally, the first conductive connecting member and the second conductive connecting member are both arranged along the inner edge of the frame.

[0009] Optionally, the box body includes a frame and a support plate connected to the bottom of the frame, and the first conductive connector and the second conductive connector are arranged on the support plate and respectively arranged at two ends of the heat exchange plate in a first direction.

[0010] Optionally, the heat exchange plate is provided with a clearance groove recessed toward the inner direction of the heat exchange plate at two ends in the first direction, and the conductive connecting member abuts against the clearance groove.

[0011] Optionally, the conductive connecting member is glued and fixed to the box; or the conductive connecting member is fixedly connected to the box via a fixing member.

[0012] Optionally, the heat exchange assembly further includes a connecting pipe for connecting the plurality of heat exchange plates, and the heat exchange plates are provided with connecting holes cooperating with the connecting pipe; the conductive connector is conductive foam, and at least part of the conductive foam is arranged below the connecting hole.

[0013] Optionally, the conductive connecting member is arranged along an extension direction of the connecting tube.

[0014] A second aspect of the present disclosure provides an electrical device, comprising the above-mentioned battery pack.

[0015] Through the above technical solution, the heat exchange plate and the box are conductively connected through the conductive connector, so that when the insulation between the battery cell and the heat exchange plate fails, the heat exchange plate can conduct electricity to the box through the conductive connector, avoiding the risk of the heat exchange plate being charged and the risk of leakage or even fire between the heat exchange plates, thereby improving the safety and stability of the battery pack.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0018] Figure 1 is a schematic structural diagram of a battery pack provided in an exemplary embodiment of the present disclosure from a first angle;

[0019] Figure 2 is a schematic diagram of a partial cross-sectional structure of a battery pack provided in an exemplary embodiment of the present disclosure;

[0020] Figure 3 yes Figure 2 Schematic diagram of the partial enlarged structure of part A in the middle.

[0021] Description of Reference Numerals

[0022] 1-box; 11-support plate; 12-frame; 2-battery cell; 3-heat exchange assembly; 31-heat exchange plate; 32-connecting pipe; 4-conductive connector; 41-first conductive connector. DETAILED DESCRIPTION

[0023] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0024] In this disclosure, unless otherwise stated, directional words such as "upper" and "lower" usually refer to the state of use of the battery pack, and "inside" and "outside" refer to the parts themselves. Figure 3 The direction pointed by X in the middle. For details of the "second direction", please refer to Figure 3 In the embodiment of the present invention, the term "first", "second", etc. is used to distinguish one element from another element, and does not have order or importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0025] like Figure 1-Figure 3 As shown, in order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a battery pack, including: a box body 1, a battery pack, a heat exchange component 3 and a conductive connector 4, wherein the box body 1 may include a support plate 11 for carrying the battery pack, and the battery pack is provided to include a plurality of battery cells 2, and the battery cells 2 are fixedly arranged on the support plate 11 in the box body 1. For example, a plurality of mounting positions may be arranged on the support plate 11, and a battery cell 2 is installed on each mounting position; the heat exchange component 3 is arranged in the box body 1, and the heat exchange component 3 includes a heat exchange plate 31 for exchanging heat with the battery cells 2, wherein the heat exchange plate 31 can be in contact with a large surface of the plurality of battery cells 2, and the coolant exchanges heat with the battery cells 2 over a large area through the heat exchange plate 31 so that the temperature of each battery cell 2 is controlled within a preset range; the conductive connector 4 electrically connects the heat exchange plate 31 and the box body 1.

[0026] Through the above technical solution, the heat exchange plate 31 and the box body 1 are conductively connected through the conductive connector 4, so that when the insulation between the battery cell 2 and the heat exchange plate 31 fails, the heat exchange plate 31 can conduct electricity to the box body 1 through the conductive connector 4, avoiding the heat exchange plate 31 being charged and the risk of leakage or even fire between the heat exchange plates 31, thereby improving the safety and stability of the battery pack.

[0027] In some practicable embodiments, the conductive connector 4 may be a conductive foam and / or a metal bracket, and the conductive connector 4 may be glued and fixed to the box body 1; or the conductive connector 4 may be fixedly connected to the box body 1 through a fixing member. For example, the conductive connector 4 may be made of conductive foam alone, and the conductive foam may be fixed to the support plate 11 of the box body 1 by gluing, and the heat exchange plate 31 is connected to the box body 1 through the conductive foam, so that when the insulation between the battery cell 2 and the heat exchange plate 31 fails, the heat exchange plate 31 conducts electricity to the box body 1 through the conductive foam, thereby preventing the heat exchange plate 31 from being charged. In addition, the conductive foam also has a heat-insulating effect. When the heat exchange plate 31 heats the battery cell 2, it can reduce heat loss and ensure the heating effect of the battery pack.

[0028] Of course, it can be understood that the above-mentioned conductive connector 4 is constructed as conductive foam for schematic purposes. In other embodiments, the conductive connector 4 can also be other conductive structures. For example, the conductive connector 4 can also be a metal bracket. The metal bracket can be fixed to the box body 1 through a fixing member and connected to the heat exchange plate 31, so that the heat exchange plate 31 can be electrically connected to the box body 1 through the metal bracket. The fixing member can be a bolt. When the insulation between the battery cell 2 and the heat exchange plate 31 fails, the heat exchange plate 31 can conduct electricity to the box body 1 through the metal bracket, thereby avoiding the heat exchange plate 31 from being charged, thereby improving the safety and stability of the battery pack.

[0029] In addition, the above-mentioned conductive connector 4 can also be constructed as a structure with an upper layer of conductive foam and a lower layer of a metal bracket. The conductive foam is fixedly connected to the metal bracket by a conductive glue, so that the heat exchange plate 31 is electrically connected to the box body 1, thereby avoiding the heat exchange plate 31 from being charged, thereby improving the safety and stability of the battery pack.

[0030] In some practicable embodiments, in order to facilitate the connection between the heat exchange plate 31 and the housing 1, the number of the conductive connectors 4 is one or more, and at least one conductive connector 4 is connected to one side of the heat exchange plate 31 in the first direction. For example, the number of the conductive connector 4 is one and the conductive connector 4 can be a conductive foam, which is connected to one side of the heat exchange plate 31 in the first direction, wherein the first direction can refer to Figure 2 or Figure 3 In the middle X direction, the heat exchange plate 31 can be connected to the conductive foam on one side of the first direction, so that the heat exchange plate 31 is connected to the box body 1 through the conductive foam, thereby avoiding the heat exchange plate 31 from being charged, thereby improving the safety and stability of the battery pack.

[0031] Of course, the number of the above-mentioned conductive connectors 4 is one and is schematic. In other embodiments, there can be two. For example, the number of the conductive connectors 4 is two, and the conductive connectors 4 include a first conductive connector 41 and a second conductive connector (not shown in the figure), wherein the first conductive connector 41 and the second conductive connector can both be conductive foams, and the first conductive connector 41 and the second conductive connector are respectively arranged on opposite sides of the heat exchange plate 31 in the first direction, and the bottom ends of the first conductive connector 41 and the second conductive connector are fixed on the support plate 11 of the box body 1, and the top ends or sides of the first conductive connector 41 and the second conductive connector are abutted against opposite sides of the heat exchange plate 31 in the first direction. In this way, the heat exchange plate 31 can be connected to the box body 1 through the first conductive connector 41 and the second conductive connector, thereby improving the stability of the connection between the heat exchange plate 31 and the box body 1. When the battery pack collides, for example, the side of the first conductive connector 41 is squeezed and deformed. At this time, the first conductive connector 41 may be separated from the heat exchange plate 31, and the heat exchange plate 31 can be connected to the box body 1 through the second conductive connector. In this way, the stability of the connection between the heat exchange plate 31 and the box body 1 can be further improved through the first conductive connector 41 and the second conductive connector, thereby improving the safety and stability of the battery pack.

[0032] It can be understood that the support plate 11 in the box body 1 can be rectangular, and the multiple battery cells 2 are first arranged at intervals along the width direction of the support plate 11, and then the entire row of battery cells 2 are arranged at intervals along the length direction of the support plate 11, wherein the first direction is the same as the width direction of the support plate 11, and the specific reference can be made to Figure 2 or Figure 3 In the X direction, the length direction of the support plate 11 can be specifically referred to Figure 2 or Figure 3In the middle Y direction, multiple battery cells 2 can be arranged at intervals along the X direction first, and the multiple battery cells 2 arranged at intervals along the X direction constitute a battery pack, and the battery pack is then arranged at intervals along the Y direction. There are multiple heat exchange plates 31 and they correspond to the number of battery packs one by one. The heat exchange plates 31 extend along the X direction and contact the large surface of the battery cells 2 in the battery pack. Both ends of the multiple heat exchange plates 31 in the first direction are provided with connecting holes, and the multiple connecting holes located on the same side are connected by corresponding connecting pipes 32, so that the refrigerant enters from one side of the heat exchange plate 31 through the connecting pipe 32 and flows out from the other opposite side, thereby performing heat exchange treatment on the battery cells 2. It can be understood that the first conductive connector 41 and the second conductive connector are respectively provided at the opposite ends of the heat exchange plate 31 in the first direction, both of which can be conductive foams, and the conductive foams are fixedly connected by the conductive adhesive support plate 11, so that the heat exchange plate 31 can be connected to the support plate 11 at both ends in the first direction through the conductive foam, thereby further improving the stability of the connection between the heat exchange plate 31 and the box body 1, thereby improving the safety and stability of the battery pack. In addition, at least part of the conductive foam is disposed below the connecting hole and arranged along the extension direction of the connecting tube 32. Thus, when refrigerant leaks at the connecting hole, part of the refrigerant can be absorbed by the conductive foam to mitigate the safety impact of the leakage on the battery pack.

[0033] It should be noted that in addition to the above-mentioned support plate 11, the box body 1 also includes a frame 12. The support plate 11 is connected to the bottom of the frame 12. The setting of the frame 12 can protect the battery cell 2 located on the support plate 11. In addition, a first explosion-proof valve is also provided on the frame 12. When the second explosion-proof valve (not shown in the figure) on the battery cell 2 is facing the support plate 11, a thermal runaway channel (not shown in the figure) connected to the frame 12 is provided in the support plate 11. The gas of the battery cell 2 flows from the support plate 11 to the frame 12 through the thermal runaway channel, and is discharged from the first explosion-proof valve (not shown in the figure) of the frame 12 to the outside of the battery pack.

[0034] Of course, in order to facilitate the installation of the conductive connector 4, in some feasible methods, the first conductive connector 41 and the second conductive connector are both arranged along the inner edge of the frame 12. In this way, after the battery cell 2 is installed on the support plate 11, the conductive connector 4 can be arranged on the inner edge of the frame 12. For example, the first conductive connector 41 and the second conductive connector can be fixed to the two inner edges of the frame 12 that are relatively arranged along the first direction by conductive glue. The frame 12 is fixedly connected to the support plate 11 so that the first conductive connector 41 and the second conductive connector arranged on the inner edge of the frame 12 can be respectively connected to the heat exchange plate 31 connected to the battery cell 2, so that when assembling the battery pack, the conductive connector 4 can be assembled and installed synchronously with the frame 12 and the support plate 11.

[0035] In some feasible embodiments, in order to facilitate the conductive connector 4 to connect the heat exchange plate 31 and the box body 1, the heat exchange plate 31 is provided with a recessed groove recessed toward the inner direction of the heat exchange plate 31 at both ends in the first direction, and the conductive connector 4 abuts against the recessed groove, wherein the recessed groove may be arc-shaped, and the conductive connector 4 may be conductive foam, the bottom end of the conductive foam is fixed on the support plate 11, and the top and inner end of the conductive foam are in contact with the arc-shaped recessed groove, thereby increasing the contact area between the heat exchange plate 31 and the conductive foam, so that the electrical connection between the heat exchange plate 31 and the support plate 11 is more stable, thereby improving the safety of the battery pack.

[0036] It is understandable that the arc-shaped configuration of the above-mentioned clearance groove is schematic. In other embodiments, the clearance groove may also be in other shapes. For example, the projection of the clearance groove when viewed along the length direction of the support plate 11 may also be in an L-shape.

[0037] The second aspect of the present disclosure provides an electrical device, including the above-mentioned battery pack. The electrical device includes the above-mentioned battery pack, and the heat exchange plate 31 and the box body 1 are conductively connected through the conductive connector 4 in the battery pack, so that when the insulation between the battery cell 2 and the heat exchange plate 31 fails, the heat exchange plate 31 conducts electricity to the box body 1 through the conductive connector 4, avoiding the risk of the heat exchange plate 31 being charged and the risk of leakage or even ignition between the heat exchange plates 31, thereby making the battery pack more stable and safe, thereby improving the safety and stability of the electrical device.

[0038] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0040] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery pack, characterized in that: include: Box, The battery pack includes a plurality of battery cells, wherein the battery cells are fixedly arranged in the box. a heat exchange assembly, disposed in the box, comprising a heat exchange plate for exchanging heat for the battery cells; and A conductive connector electrically connects the heat exchange plate and the box.

2. The battery pack according to claim 1, characterized in that: The conductive connecting piece is conductive foam and / or a metal bracket.

3. The battery pack according to claim 1, characterized in that: The number of the conductive connecting members is one or more, and at least one of the conductive connecting members is connected to a side edge of the heat exchange plate in a first direction.

4. The battery pack according to claim 3, characterized in that: The number of the conductive connectors is two, and the conductive connectors include a first conductive connector and a second conductive connector. The first conductive connector and the second conductive connector are respectively arranged on two opposite sides of the heat exchange plate in the first direction.

5. The battery pack according to claim 4, characterized in that: The box body includes a frame and a support plate connected to the bottom of the frame, and the first conductive connector and the second conductive connector are arranged on the support plate and are respectively arranged at two ends of the heat exchange plate in the first direction.

6. The battery pack according to claim 5, characterized in that: The first conductive connecting member and the second conductive connecting member are both arranged along the inner edge of the frame.

7. The battery pack according to claim 1, characterized in that: The heat exchange plate is provided with a clearance groove recessed toward the inner direction of the heat exchange plate at two ends in the first direction, and the conductive connecting member abuts against the clearance groove.

8. The battery pack according to claim 1, characterized in that: The conductive connector is glued and fixed to the box; or The conductive connecting member is fixedly connected to the box body through a fixing member.

9. The battery pack according to any one of claims 1 to 8, characterized in that: The heat exchange assembly further comprises a connecting pipe for connecting a plurality of the heat exchange plates, and the heat exchange plates are provided with connecting holes matched with the connecting pipe; The conductive connecting member is conductive foam, and at least a portion of the conductive foam is disposed below the connecting hole.

10. The battery pack according to claim 9, characterized in that: The conductive connecting member is arranged along an extending direction of the connecting pipe.

11. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 10.

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