Battery, battery pack and electric equipment

Abstract

The utility model relates to a battery, a battery pack and electric equipment, and aims to solve the problems of low heat dissipation efficiency and poor placement flexibility of the battery. The battery comprises a shell, a heat exchange piece and a battery cell, the shell comprises a shell main body and two end covers which are located at the two ends of the shell main body and are in conductive connection with the shell main body, the shell main body and the two end covers jointly define a containing cavity, the heat exchange piece is arranged in the containing cavity in a penetrating mode, and at least one end of the heat exchange piece penetrates through at least one end cover and is insulated from the end cover; the battery cell is located in the containing cavity and surrounds the heat exchange part, the heat exchange part can exchange heat with the battery cell, a first tab of the battery cell is conductively connected with the heat exchange part, and a second tab of the battery cell is conductively connected with the shell. According to the battery provided by the invention, heat in the battery cell can be directly conducted out through the heat exchange piece for heat dissipation, so that the heat dissipation efficiency of the battery is improved. In addition, electrodes are allowed to be led out from the top, the side part or the bottom of the battery, so that the battery is more flexible to place.

Description

Technical Field

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

[0002] Most single-cell batteries in related technologies use a solution in which the bottom shell contacts a cold plate to cool the battery. However, since most of the heat of the battery is concentrated inside the battery cell, the heat inside the battery cell needs to be slowly transferred to the bottom of the battery before it can be dissipated, resulting in low overall heat dissipation efficiency of the battery. Low heat dissipation efficiency of the battery will limit the size of the battery cell and also limit the power performance of the battery. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery, a battery pack and an electrical device to solve the technical problems existing in the related art.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a battery in a first aspect, comprising:

[0005] The housing comprises a housing body and two end covers respectively located at two ends of the housing body, wherein the housing body and the two end covers jointly define a receiving cavity, and the two end covers are both electrically connected to the housing body;

[0006] a heat exchange element, which is inserted into the accommodating cavity, wherein at least one end of the heat exchange element passes through at least one end cover and is insulated from the end cover; and

[0007] A battery cell is located in the accommodating cavity and surrounds the heat exchange element. The heat exchange element can exchange heat with the battery cell. The first pole ear of the battery cell is conductively connected to the heat exchange element, and the second pole ear of the battery cell is conductively connected to the shell.

[0008] Optionally, the heat exchange element extends along the axial direction of the battery core and penetrates the battery core.

[0009] Optionally, the central axis of the heat exchange element coincides with the central axis of the shell; and / or,

[0010] The central axis of the heat exchange element coincides with the central axis of the battery core.

[0011] Optionally, the battery further comprises an electrode lead-out member, wherein the electrode lead-out member is located outside the housing and is conductively connected to the heat exchange member.

[0012] Optionally, the two end caps located at both ends of the shell body are respectively a first end cap and a second end cap, and the electrode lead-out member includes a first electrode lead-out member and a second electrode lead-out member;

[0013] The first end of the heat exchange member passes through the first end cover and is conductively connected to the first electrode lead-out member, and the first end of the heat exchange member is insulated from the first end cover;

[0014] The second end of the heat exchange element is insulated from the second end cover.

[0015] Optionally, the battery further includes an intermediate connector, one end of which is located in the accommodating cavity and is conductively connected to the first pole ear of the battery cell, the other end of the intermediate connector passes through the first end cover and is conductively connected to the first electrode lead-out piece, the heat exchanger is conductively connected to the intermediate connector, and the intermediate connector is insulated from the first end cover.

[0016] Optionally, the intermediate connecting member includes a sleeve portion and a protrusion protruding radially outward from the sleeve portion, the sleeve portion is sleeved on the heat exchanger and conductively connected to the heat exchanger, the protrusion is located in the accommodating cavity and conductively connected to the first pole ear of the battery cell, and the first electrode lead-out member is conductively connected to an end of the sleeve portion away from the protrusion.

[0017] Optionally, the battery further includes a first insulating structure, the first electrode lead-out piece is sleeved on the sleeve portion, the protrusion, the sleeve portion and the first electrode lead-out piece jointly define a first groove, part of the first end cover is located in the first groove, and the first insulating structure is located in the first groove to insulate the intermediate connector and the first electrode lead-out piece from the first end cover.

[0018] Optionally, the electrode lead-out member further includes a second electrode lead-out member, and the second end of the heat exchange member passes through the second end cover and is conductively connected to the second electrode lead-out member.

[0019] Optionally, the battery further comprises a second insulating structure, which is mounted on the heat exchange member and is used to insulate the heat exchange member and the second electrode lead-out member from the second end cover.

[0020] Optionally, the heat exchanger is provided with a limiting portion protruding outward from the heat exchanger along the radial direction of the heat exchanger, the limiting portion is located in the accommodating cavity, the second electrode lead-out piece is sleeved on the heat exchanger, the limiting portion, the second electrode lead-out piece and the heat exchanger jointly define a second groove, part of the second end cover is located in the second groove, and the second insulating structure is arranged in the second groove.

[0021] Optionally, the limiting portion is located between the second end cover and the battery cell, a side of the limiting portion close to the battery cell abuts against the battery cell, and a third insulating structure is provided between the battery cell and the limiting portion.

[0022] Optionally, the second end of the heat exchange element is located in the accommodating cavity and has a gap with the second end cover.

[0023] Optionally, the heat exchange element is a heat exchange tube, and a flow channel for the heat exchange medium to flow through is formed in the heat exchange tube; or,

[0024] The heat exchange element is a solid heat exchange column.

[0025] Optionally, the battery further includes a first adapter sheet and a second adapter sheet;

[0026] The first pole lug of the battery cell is conductively connected to the first adapter plate, the first adapter plate is conductively connected to the heat exchange element, the second pole lug of the battery cell is conductively connected to the second adapter plate, and the second adapter plate is conductively connected to the housing.

[0027] Optionally, the first adapter plate is located between the first end of the battery cell and an end cover close to the first end of the battery cell, and the second adapter plate is located between the second end of the battery cell and an end cover close to the second end of the battery cell.

[0028] A second aspect of the present disclosure provides a battery pack, comprising the battery described in any of the above embodiments.

[0029] A third aspect of the present disclosure provides an electrical device, comprising the battery described in any one of the above embodiments; or,

[0030] A battery pack comprising the above embodiment is provided.

[0031] Through the above technical solution, since the battery cell is located in the accommodating cavity and surrounds the heat exchanger, the interior of the battery cell can directly exchange heat with the heat exchanger, so that the heat inside the battery cell can be quickly dissipated through the heat exchanger, thereby improving the heat dissipation efficiency of the battery. In addition, due to the improvement of the heat dissipation efficiency of the battery cell, on the one hand, the limitation on the size of the battery cell caused by the low heat dissipation efficiency can be reduced, allowing the size of the battery cell to be larger; on the other hand, the battery power performance can be improved, such as improving the performance of the battery during the charging and discharging process, and extending the service life of the battery. Of course, when the temperature of the battery cell is low and needs to be heated, the heat exchanger can also directly heat the inside of the battery cell to improve the heating efficiency of the battery.

[0032] In addition, since the first pole ear of the battery cell is conductively connected to the heat exchanger, the second pole ear of the battery cell is conductively connected to the shell, and the heat exchanger is insulated from the end cover of the shell, the shell and the heat exchanger can respectively lead out the positive and negative poles of the battery. Therefore, when leading out the electrode, one of the positive and negative electrodes can be led out through the heat exchanger, and the other of the positive and negative electrodes can be led out through the shell body or the end cover of the shell. In this way, depending on the different placement of the battery, the electrode can be selectively led out from the top, side or bottom of the battery to connect the battery to the circuit, making the placement and installation of the battery more flexible. For the application scenario of the battery in the battery pack, it is conducive to promoting the optimized design of the battery pack to reduce the volume of the battery pack.

[0033] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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:

[0035] Figure 1 is a cross-sectional view of a battery provided by an exemplary embodiment of the present disclosure;

[0036] Figure 2 is a cross-sectional view of a battery with a hidden cell provided by an exemplary embodiment of the present disclosure;

[0037] Figure 3 is a perspective view of a battery provided by an exemplary embodiment of the present disclosure;

[0038] Figure 4 is a perspective view of a battery provided by an exemplary embodiment of the present disclosure (with Figure 3 different perspectives);

[0039] Figure 5 A schematic diagram of a battery lead-out electrode provided by an exemplary embodiment of the present disclosure Figure 1 ;

[0040] Figure 6 A schematic diagram of a battery lead-out electrode provided by an exemplary embodiment of the present disclosure Figure 2 ;

[0041] Figure 7 A schematic diagram of a battery lead-out electrode provided by an exemplary embodiment of the present disclosure Figure 3 ;

[0042] Figure 8 A schematic diagram of a battery lead-out electrode provided by an exemplary embodiment of the present disclosure Figure 4 ;

[0043] Fig. 9 yes Figure 1 The enlarged view of point A in the middle;

[0044] Fig.10 is a perspective view of an intermediate connector of a battery provided by an exemplary embodiment of the present disclosure;

[0045] Fig.11 yes Fig. 9 A schematic diagram after hiding the first insulating structure and the first end cover;

[0046] Fig.12 yes Figure 1 The enlarged view of point B in the figure;

[0047] Fig.13 yes Fig.12 A schematic diagram after hiding the second insulating structure and the second end cover;

[0048] Fig.14 is a cross-sectional view of a battery provided by another exemplary embodiment of the present disclosure;

[0049] Fig.15 is a schematic diagram of a battery pack provided by an exemplary embodiment of the present disclosure;

[0050] Fig.16 is a schematic diagram of a battery pack provided according to another exemplary embodiment of the present disclosure.

[0051] Description of Reference Numerals

[0052] 01-battery pack; 100-battery; 10-shell; 11-shell body; 12-end cover; 121-first end cover; 122-second end cover; 13-accommodating chamber; 20-heat exchange member; 21-limiting part; 22-gap; 23-flow channel; 30-battery cell; 31-first pole ear; 32-second pole ear; 40-electrode lead-out member; 41-first electrode lead-out member; 42-second electrode lead-out member; 50-intermediate connecting member; 51-sleeve part; 52-protrusion; 61-first insulating structure; 611-first upper insulating ring; 612-first lower insulating ring; 62-second insulating structure; 621-second upper insulating ring; 622-second lower insulating ring; 63-third insulating structure; 71-first groove; 72-second groove; 81-first adapter; 82-second adapter; 200-packaging shell. DETAILED DESCRIPTION

[0053] 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.

[0054] In the present disclosure, unless otherwise stated, the directional words used are defined based on the drawing directions shown in the accompanying drawings and are only for the convenience of describing the present disclosure and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, they cannot be understood as limitations on the present disclosure. The terms "inside and outside" refer to the inside and outside of the corresponding structural contours.

[0055] In addition, it should be noted that the terms used, such as "first", "second", etc., are used to distinguish one element from another element, and do not have order or importance. In addition, in the description with reference to the drawings, the same number in different drawings represents the same element.

[0056] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0057] The present disclosure provides a battery 100, such as Figure 1-Figure 14 As shown, the battery 100 includes a shell 10, a heat exchanger 20 and a battery cell 30. The shell 10 includes a shell body 11 and two end caps 12 respectively connected to the two ends of the shell body 11. The shell body 11 and the two end caps 12 can jointly define a receiving cavity 13, and the two end caps 12 are both conductively connected to the shell body 11. The heat exchanger 20 is arranged in the receiving cavity 13, and at least one end of the heat exchanger 20 passes through at least one end cap 12 and is insulated from the end cap 12. The battery cell 30 is located in the receiving cavity 13 and surrounds the heat exchanger 20. The heat exchanger 20 can exchange heat with the battery cell 30. The first pole ear 31 of the battery cell 30 can be conductively connected to the heat exchanger 20, and the second pole ear 32 of the battery cell 30 can be conductively connected to the shell 10.

[0058] Through the above technical solution, since the battery cell 30 is located in the accommodating cavity 13 and surrounds the heat exchanger 20, the interior of the battery cell 30 can directly exchange heat with the heat exchanger 20, so that the heat inside the battery cell 30 can be quickly dissipated through the heat exchanger 20, thereby improving the heat dissipation efficiency of the battery 100. In addition, due to the improvement of the heat dissipation efficiency of the battery cell 30, on the one hand, the limitation on the size of the battery cell caused by the low heat dissipation efficiency can be reduced, allowing the size of the battery cell 30 to be larger (for example, the diameter of the battery cell 30 can be increased to more than 100mm); on the other hand, the power performance of the battery 100 can be improved, such as improving the performance of the battery 100 during the charging and discharging process, and extending the service life of the battery 100. Of course, when the temperature of the battery cell 30 is low and needs to be heated, the heat exchanger 20 can also directly heat the interior of the battery cell 30 to improve the heating efficiency of the battery 100.

[0059] In addition, since the first pole ear 31 of the battery cell 30 is conductively connected to the heat exchanger 20, the second pole ear 32 of the battery cell 30 is conductively connected to the shell 10, and the heat exchanger 20 is insulated from the end cover 12 of the shell 10, the shell 10 and the heat exchanger 20 can respectively lead out the positive and negative electrodes of the battery 100. Therefore, when leading out the electrode, one of the positive and negative electrodes can be led out through the heat exchanger 20, and the other of the positive and negative electrodes can be led out through the shell body 11 or the end cover 12 of the shell 10. In this way, according to the different placement postures of the battery 100, the electrode can be selectively led out from the top, side or bottom of the battery 100 to connect the battery 100 to the circuit, so that the placement and installation of the battery 100 are more flexible. For the application scenario of the battery 100 in the battery pack 01, it is conducive to promoting the optimized design of the battery pack 01 to reduce the volume of the battery pack 01.

[0060] It should be noted that the two end caps 12 located at both ends of the shell body 11 can be structures that are independent of the shell body 11, and the two end caps 12 are connected to the shell body 11 by connection (for example, welding); or, one of the two end caps 12 is a structure that is independent of the shell body 11, and the end cap 12 is connected to the shell body 11 by connection (for example, welding), and the other end cap 12 is integrally formed with the shell body 11, and the present disclosure does not limit this. The shape of the outer shell 10 can be set to be cylindrical or square, and the present disclosure does not impose any special restrictions on the specific shape of the outer shell 10. In addition, the first pole ear 31 of the battery cell 30 can be a positive electrode, and the second pole ear 32 of the battery cell 30 can be a negative electrode; or, the first pole ear 31 of the battery cell 30 can be a negative electrode, and the second pole ear 32 of the battery cell 30 can be a positive electrode. The present disclosure does not impose any special restrictions on the polarity of the first pole ear 31 and the second pole ear 32.

[0061] In some embodiments, Figure 1As shown, the heat exchange element 20 can extend along the axial direction of the battery cell 30 and penetrate the battery cell 30. When the heat exchange element 20 penetrates the battery cell 30 along the axial direction of the battery cell 30, the heat exchange area between the heat exchange element 20 and the battery cell 30 is maximized, so that the inside of the battery cell 30 can fully exchange heat with the heat exchange element 20, thereby improving the heat exchange effect between the battery cell 30 and the heat exchange element 20.

[0062] It can be understood that, for the case where the heat exchange element 20 passes through two end covers 12, both ends of the heat exchange element 20 protrude outward from the battery cell 30 to facilitate passing through the two end covers 12; for the case where the heat exchange element 20 only passes through one end cover 12, one end of the heat exchange element 20 protrudes outward from the battery cell 30 to facilitate passing through one end cover 12, and the other end of the heat exchange element 20 can be protruded outward from the battery cell 30, or can be roughly flush with the end surface of the battery cell 30, so as to ensure that the heat exchange element 20 passes through the battery cell 30 along the axial direction of the battery cell 30, thereby improving the heat exchange effect between the battery cell 30 and the heat exchange element 20.

[0063] In addition, in the case where the heat exchange element 20 only passes through one end cover 12, the end of the heat exchange element 20 that does not pass through the end cover 12 can be spaced apart from the end cover 12, or an insulating member can be provided between the heat exchange element 20 and the end cover 12, so that the heat exchange element 20 abuts against the end cover 12. The present disclosure does not impose any special restrictions on the specific structure when the heat exchange element 20 does not pass through the end cover 12.

[0064] In some embodiments, Figure 1 and Figure 2 As shown, the central axis aa of the heat exchange element 20 may coincide with the central axis of the housing 10 ; and / or, the central axis aa of the heat exchange element 20 may also coincide with the central axis of the battery cell 30 .

[0065] When the central axis aa of the heat exchanger 20 coincides with the central axis of the housing 10, the heat exchanger 20 can be installed on the housing 10 before the battery cell 30 is installed in the housing 10. In this way, during the process of installing the battery cell 30 in the housing 10, the heat exchanger 20 can play a role in positioning the center of the battery cell 30, so that the battery cell 30 can be positioned and installed in the center of the housing 10. In addition, before the battery cell 30 is installed in the housing 10, the battery cell 30 and the heat exchanger 20 can be assembled (for example, if the battery cell 30 is a wound battery cell, the battery cell 30 can be wound around the heat exchanger 20), so that the heat exchanger 20 is located at the center of the battery cell 30, so that the cooling or heating of the battery cell 30 is more uniform. In addition, the central axis aa of the heat exchanger 20 can coincide with the central axis of the housing 10 or the central axis of the battery cell 30.

[0066] Of course, in more embodiments, when multiple battery cells 30 are arranged in the housing 10, heat exchangers 20 may be respectively arranged in the multiple battery cells 30. In this case, the heat exchanger 20 is not necessarily located at the center of the housing 10. Similarly, multiple heat exchangers 20 may be arranged in one battery cell 30, and the multiple heat exchangers 20 are not necessarily located at the center of the battery cell 30. The present disclosure does not impose any special restrictions on the specific positions of the heat exchangers 20 in the housing 10 and the battery cells 30.

[0067] The above embodiment is an introduction to the specific positional relationship between the housing 10, the heat exchanger 20 and the battery cell 30. In order to better illustrate the battery 100 of the present disclosure, the following embodiment will introduce the specific structure of the battery 100 in detail. For the convenience of introduction, the following description will be based on the example that the first pole tab 31 of the battery cell 30 is the negative pole tab and the second pole tab 32 of the battery cell 30 is the positive pole tab.

[0068] Optionally, the battery further includes an electrode lead-out member 40, which is located outside the housing 10 and is electrically connected to the heat exchange member 20. The electrode lead-out member 40 can facilitate electrical connection between the battery and a device connected to the battery.

[0069] Optionally, the material of the shell 10, the heat exchanger 20 and the electrode lead-out member 40 can be one or more conductive materials such as copper, aluminum or stainless steel. The present disclosure does not impose any special restrictions on the specific materials of the shell 10, the heat exchanger 20 and the electrode lead-out member 40.

[0070] The above-mentioned electrode lead-out piece 40 may be one or more, and the heat exchanger 20 may be electrically connected to one electrode lead-out piece 40 or to multiple electrode lead-out pieces 40. In the case where the heat exchanger 20 is electrically connected to multiple electrode lead-out pieces 40, since the heat exchanger 20 is electrically connected to the first electrode tab 31 of the battery cell 30, the heat exchanger 20 also has the function of leading the current of the battery cell 30 to the multiple electrode lead-out pieces 40.

[0071] Alternatively, if Figure 2 and Fig.14 As shown, the two end caps 12 located at both ends of the shell body 11 may be a first end cap 121 and a second end cap 122, respectively, and the electrode lead-out member 40 may include a first electrode lead-out member 41. The first end of the heat exchange member 20 passes through the first end cap 121 and is conductively connected to the first electrode lead-out member 41, and the first end of the heat exchange member 20 is insulated from the first end cap 121. The second end of the heat exchange member 20 is insulated from the second end cap 122.

[0072] For the embodiment where the heat exchange element 20 passes through the first end cover 121 and the second end cover 122, optionally, as Figures 2 to 13As shown, the electrode lead-out member 40 may further include a second electrode lead-out member 42 , and the second end of the heat exchange member 20 passes through the second end cover 122 and is conductively connected to the second electrode lead-out member 42 .

[0073] Since the first electrode lead-out member 41 and the second electrode lead-out member 42 are both conductively connected to the heat exchange member 20, the polarities of the first electrode lead-out member 41, the second electrode lead-out member 42 and the heat exchange member 20 are the same, so that the negative electrode can be output through the first electrode lead-out member 41 and the second electrode lead-out member 42. Similarly, since both ends of the heat exchange member 20 are insulated from the first end cover 121 and the second end cover 122, the polarities of the shell body 11, the first end cover 121 and the second end cover 122 are the same, so that the positive electrode can be output through the shell body 11, the first end cover 121 and the second end cover 122.

[0074] When the electrode is drawn out, Figure 5 As shown, the positive electrode can be led out through the first end cover 121, and the negative electrode can be led out through the first electrode lead-out member 41, so that both the positive electrode and the negative electrode can be led out from the top of the battery 100, which can be suitable for the vertical arrangement or horizontal arrangement of the battery 100.

[0075] Or, if Figure 6 As shown, the positive electrode can be led out through the second end cover 122, and the negative electrode can be led out through the first electrode lead-out member 41, so that the positive electrode and the negative electrode can be led out from the top and bottom of the battery 100 respectively, so that no other lead-out structure is provided on the side wall of the battery 100, which can be suitable for the horizontal arrangement of the battery 100.

[0076] Or, if Figure 7 As shown, the positive electrode can be led out through the first end cover 121 and the negative electrode can be led out through the second electrode lead-out member 42 , so that the positive electrode and the negative electrode can be led out from the top and bottom of the battery 100 respectively, which can be suitable for the horizontal arrangement of the battery 100 .

[0077] Or, if Figure 8 As shown, the positive electrode can be led out through the second end cover 122, and the negative electrode can be led out through the second electrode lead-out member 42, so that both the positive electrode and the negative electrode can be led out from the bottom of the battery 100, which can be suitable for the hanging arrangement or horizontal arrangement of the battery 100.

[0078] Alternatively, the positive electrode can be led out through the shell body 11, and the negative electrode can be led out through the first electrode lead-out member 41 or the second electrode lead-out member 42, so that the positive electrode and the negative electrode can be led out from the side and one of the ends of the battery 100 respectively, which can be suitable for the vertical arrangement of the battery 100.

[0079] For example, when the battery 100 needs to be arranged vertically, the following can be selected: Figure 5 or Figure 8 When the battery 100 needs to be arranged horizontally, the following electrode lead-out method can be selected: Figure 6 or Figure 7 When the battery 100 needs to be arranged in a hanging manner, the following electrode lead-out method can be selected: Figure 8 In addition, when the battery 100 is arranged in a combination of vertical and horizontal positions, the electrode can also be led out from the shell body 11 of the battery 100. Therefore, the present disclosure can freely select the specific electrode lead-out method according to the different placement postures of the battery 100, so that the placement of the battery 100 is more flexible, promoting the optimized design of the battery pack 01, and reducing the volume of the battery pack 01.

[0080] The two ends of the heat exchange member 20 may also be flush with the first electrode lead-out member 41 and the second electrode lead-out member 42 , so that the battery 100 can be better arranged in a vertical or hanging manner.

[0081] In some embodiments, Figure 1 and Fig. 9 As shown, the battery 100 may also include an intermediate connector 50, one end of the intermediate connector 50 is located in the accommodating cavity 13 and is conductively connected to the first pole ear 31 of the battery cell 30, the other end of the intermediate connector 50 passes through the first end cover 121 and is conductively connected to the first electrode lead-out member 41, the heat exchanger 20 is conductively connected to the intermediate connector 50, and the intermediate connector 50 is insulated from the first end cover 121.

[0082] Thus, the setting of the intermediate connector 50 enables the battery cell 30 to be first loaded into the accommodating cavity 13 from the first end of the heat exchanger 20, and then the intermediate connector 50 is connected to the heat exchanger 20 to limit the axial position of the battery cell 30 and prevent the battery cell 30 from being separated from the first end of the heat exchanger 20. In addition, the first pole tab 31 of the battery cell 30, the heat exchanger 20, and the first electrode lead-out member 41 can establish an electrical connection relationship through the intermediate connector 50. The setting of the intermediate connector 50 can also play a transitional role in the conductive connection between the first pole tab 31, the first electrode lead-out member 41, and the heat exchanger 20, thereby avoiding the problem of increasing the difficulty of processing due to the direct connection of the first pole tab 31 and the first electrode lead-out member 41 to the heat exchanger 20.

[0083] The intermediate connecting member 50 may be made of the same or different conductive material as the heat exchange member 20 , and the present disclosure does not impose any special restrictions on the specific material of the intermediate connecting member 50 .

[0084] Alternatively, if Fig. 9 and Fig.10As shown, the intermediate connector 50 may include a sleeve portion 51 and a protrusion 52 protruding radially outward from the sleeve portion 51 along the sleeve portion 51. The sleeve portion 51 may be sleeved on the heat exchanger 20 and conductively connected to the heat exchanger 20. The protrusion 52 is located in the accommodating cavity 13 and conductively connected to the first pole ear 31 of the battery cell 30. The first electrode lead-out member 41 is conductively connected to one end of the sleeve portion 51 away from the protrusion 52.

[0085] Among them, the sleeve portion 51 is sleeved on the heat exchanger 20. Since the sleeve portion 51 overlaps with the heat exchanger 20 in the axial direction, the contact between the sleeve portion 51 and the heat exchanger 20 can be increased. During assembly, the sleeve portion 51 can be sleeved on the heat exchanger 20 by welding or interference connection, and the present disclosure does not impose any special restrictions on the connection method between the sleeve portion 51 and the heat exchanger 20. The protrusion 52 protrudes outward along the radial direction of the sleeve portion 51, increasing the radial size of the intermediate connector 50, thereby reducing the difficulty of conductive connection with the first pole ear 31 of the battery cell 30. At the same time, the protrusion 52 can also play a role in limiting the battery cell 30.

[0086] Alternatively, if Figures 9 to 11 As shown, the battery 100 may further include a first insulating structure 61, the first electrode lead-out member 41 may be sleeved on the sleeve portion 51, the protrusion 52, the sleeve portion 51 and the first electrode lead-out member 41 jointly define a first groove 71, a portion of the first end cover 121 is located in the first groove 71, and the first insulating structure 61 is located in the first groove 71 to insulate the intermediate connector 50 and the first electrode lead-out member 41 from the first end cover 121.

[0087] In this way, the first groove 71 enclosed by the first electrode lead-out member 41 and the intermediate connecting member 50 can not only provide an installation position for the first insulating structure 61, but also the first end cover 121 is limited in the first groove 71, which can also prevent the heat exchange member 20 from moving in the axial direction, thereby ensuring the stability and reliability of the battery 100 structure.

[0088] Among them, the first insulating structure 61 may include a first upper insulating ring 611 and a first lower insulating ring 612, the first upper insulating ring 611 may be installed between the first electrode lead-out member 41 and the first end cover 121, and the first lower insulating ring 612 may be installed between the protrusion 52 and the first end cover 121. The first insulating structure 61 may be made of insulating sealing material so that the intermediate connector 50, the first electrode lead-out member 41 and the first end cover 121 can be both insulated and sealed. Of course, the first insulating structure 61 may also adopt a structural method in which an insulating sealing coating is applied in the first groove 71. The present disclosure does not impose any special restrictions on the specific structure of the first insulating structure 61.

[0089] Alternatively, if Fig.12As shown, the battery 100 further includes a second insulating structure 62 , which is mounted on the heat exchange element 20 and is used to insulate the heat exchange element 20 and the second electrode lead-out member 42 from the second end cover 122 .

[0090] Optionally, the second insulating structure 62 may include a second upper insulating ring 621 and a second lower insulating ring 622, the second upper insulating ring 621 may be installed between the heat exchanger 20 and the second end cover 122, and the second lower insulating ring 622 may be installed between the second electrode lead-out member 42 and the second end cover 122. The material of the second insulating structure 62 may be the same as that of the first insulating structure 61. Of course, the second insulating structure 62 may also be a structure coated with an insulating sealing coating. The present disclosure does not impose any special restrictions on the specific structure of the second insulating structure 62.

[0091] In some embodiments, Fig.12 and Fig.13 As shown, the heat exchanger 20 may be provided with a limiting portion 21 protruding outward from the heat exchanger 20 along the radial direction of the heat exchanger 20, the limiting portion 21 is located in the accommodating cavity 13, the second electrode lead-out member 42 is sleeved on the heat exchanger 20, the limiting portion 21, the second electrode lead-out member 42 and the heat exchanger 20 jointly define a second groove 72, a portion of the second end cover 122 is located in the second groove 72, and the second insulating structure 62 is arranged in the second groove 72.

[0092] In this way, the second groove 72 surrounded by the second electrode lead-out member 42, the heat exchange member 20 and the limiting portion 21 can not only provide an installation position for the second insulating structure 62, but also the second end cover 122 is limited in the second groove 72, which can also prevent the heat exchange member 20 from moving in the axial direction, thereby ensuring the stability and reliability of the battery 100 structure.

[0093] Optionally, the limiting portion 21 can be pre-connected to the heat exchanger 20 by welding or riveting, or can be formed by stamping the outer wall of the heat exchanger 20. The present disclosure does not impose any special restrictions on the specific forming method of the limiting portion 21. During assembly, the battery cell 30 can be first loaded from the first end of the heat exchanger 20, and then the intermediate connector 50 in the above embodiment is installed, so that the battery cell 30 is limited between the limiting portion 21 and the intermediate connector 50.

[0094] In some embodiments, the limiting portion 21 is located between the second end cover 122 and the battery cell 30 , and a side of the limiting portion 21 close to the battery cell 30 abuts against the battery cell 30 . A third insulating structure 63 is disposed between the battery cell 30 and the limiting portion 21 .

[0095] Therefore, when the battery 100 is placed vertically, the limiting portion 21 can not only support the battery cell 30, but also avoid conductive contact between the battery cell 30 and the second end cover 122. In order to improve the insulation effect between the limiting portion 21 and the battery cell 30, a third insulating structure 63 can be provided between the battery cell 30 and the limiting portion 21. Similarly, the third insulating structure 63 can be an insulating layer structure or an insulating coating, and the present disclosure does not impose any special restrictions on this.

[0096] The above embodiment is a detailed description of the case where both ends of the heat exchanger 20 penetrate the first end cover 121 and the second end cover 122. In other embodiments, only one end of the heat exchanger 20 may penetrate the first end cover 121 and be conductively connected to the first electrode lead-out member 41. Fig.14 As shown, the second end of the heat exchange element 20 may be located in the accommodating cavity 13 with a gap 22 between the second end cover 122 to prevent the other end of the heat exchange element 20 from being connected to the second end cover 122 and causing a short circuit in the battery 100.

[0097] In the above embodiment, only one end of the heat exchanger 20 is conductively connected to the first electrode lead-out member 41, and the first electrode lead-out member 41 has the same polarity as the heat exchanger 20, so that the negative electrode can be output through the first electrode lead-out member 41. Similarly, since both ends of the heat exchanger 20 are insulated from the first end cover 121 and the second end cover 122, the shell body 11, the first end cover 121 and the second end cover 122 have the same polarity, so that the positive electrode can be output through the shell body 11, the first end cover 121 and the second end cover 122.

[0098] For the embodiment in which only one end of the heat exchanger 20 passes through the first end cover 121 and is conductively connected to the first electrode lead-out member 41 , the intermediate connector 50 and the first insulating structure 61 mentioned above may also be provided between the heat exchanger 20 and the first electrode lead-out member 41 .

[0099] In some embodiments, Figure 1 As shown, the heat exchange element 20 may be a heat exchange tube, and a flow channel 23 for a heat exchange medium to flow through is formed in the heat exchange tube. When the heat exchange medium flows through the flow channel 23, the heat inside the battery cell 30 can be taken out or heated to the battery cell by the flow of the heat exchange medium, thereby achieving the function of dissipating heat inside the battery cell 30. The heat exchange medium may be either a liquid or a gas, and the present disclosure does not impose any special restrictions on the specific material of the heat exchange medium.

[0100] It can be understood that when only one end of the heat exchange tube passes through the end cover 12, the end of the heat exchange tube located in the accommodating cavity 13 is closed, and two flow openings can be opened at the end located outside the accommodating cavity 13, so that the heat exchange medium can flow in from one flow opening and flow out from the other flow opening to dissipate heat.

[0101] In other embodiments, the heat exchanger 20 may also be a solid heat exchange column. For embodiments in which an electrode lead-out member 40 is provided, the heat exchange column may be able to conduct heat to the electrode lead-out member 40. When the heat exchanger 20 is a solid heat exchange column, the heat inside the battery cell 30 can still be conducted from the heat exchange column by heat conduction. The material of the heat exchange column may be a metal material with a high thermal conductivity, and the present disclosure does not impose any special restrictions on the specific material of the heat exchange column.

[0102] In some embodiments, Fig. 9 and Fig.12 As shown, the battery 100 may further include a first adapter 81 and a second adapter 82. The first tab 31 of the battery cell 30 is conductively connected to the first adapter 81, the first adapter 81 is conductively connected to the heat exchange element 20, the second tab 32 of the battery cell 30 is conductively connected to the second adapter 82, and the second adapter 82 is conductively connected to the housing 10.

[0103] Among them, the first adapter 81 can play a role of converging the first pole ear 31, and the second adapter 82 can play a role of converging the second pole ear 32. But at the same time, the heat is relatively large at the part where the first adapter 81 is connected to the first pole ear 31, and the heat is also relatively large at the part where the second adapter 82 is connected to the second pole ear 32. For the embodiment provided with the intermediate connector 50, since the intermediate connector 50 is a metal conductive material, the heat dissipation capacity of the intermediate connector 50 is also relatively strong, so that the heat at the part where the first adapter 81 is connected to the first pole ear 31 can also be quickly conducted outward through the intermediate connector 50. Similarly, since the second end cover 122 is also a metal conductive material, the heat dissipation capacity of the second end cover 122 is also relatively strong, so that the heat at the part where the second adapter 82 is connected to the second pole ear 32 can also be quickly conducted outward through the second end cover 122.

[0104] In some embodiments, Fig. 9 and Fig.12 As shown, the first adapter plate 81 is located between the first end of the battery cell 30 and the end cover 12 close to the first end of the battery cell 30 , and the second adapter plate 82 is located between the second end of the battery cell 30 and the end cover 12 close to the second end of the battery cell 30 .

[0105] In this way, the first adapter plate 81 and the second adapter plate 82 are respectively arranged at the two ends of the battery cell 30, which is conducive to maintaining the symmetry of the battery 100 structure, thereby helping to reduce the difficulty of the battery 100 assembly process and maintain the compactness of the battery 100 structure.

[0106] The above embodiment is a detailed description of the specific structure of the battery 100. In order to better apply the battery 100 in the above embodiment, the second aspect of the present disclosure provides a battery pack 01, such as Fig.15 and 16 As shown, the battery pack 01 may include a battery 100 according to any of the above-mentioned embodiments.

[0107] The battery 100 in the battery pack 01 can be either Fig.15 The vertical arrangement shown can also be arranged as follows Fig.16 In addition, the batteries 100 in the battery pack 01 can also be arranged in a combination of vertical and horizontal arrangements to reduce the volume of the battery pack 01. After the batteries 100 are arranged, the packaging shell 200 can be used to package the batteries 100 to form the battery pack 01.

[0108] A third aspect of the present disclosure provides an electrical device, comprising the battery 100 of the above embodiment or the battery pack 01 of the above embodiment.

[0109] The present disclosure does not limit the type of electrical equipment, for example, it can be a vehicle, a mobile phone, a portable device, a laptop computer, an electric toy, an electric tool, a drone, a lighting device, etc. The vehicle can be a fuel vehicle, a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc.

[0110] 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.

[0111] 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.

[0112] 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, characterized in that: include: The housing comprises a housing body and two end covers respectively located at two ends of the housing body, wherein the housing body and the two end covers jointly define a receiving cavity, and the two end covers are both electrically connected to the housing body; a heat exchange element, which is inserted into the accommodating cavity, wherein at least one end of the heat exchange element passes through at least one end cover and is insulated from the end cover; and A battery cell is located in the accommodating cavity and surrounds the heat exchange element. The heat exchange element can exchange heat with the battery cell. The first pole ear of the battery cell is conductively connected to the heat exchange element, and the second pole ear of the battery cell is conductively connected to the shell.

2. The battery according to claim 1, characterized in that The heat exchange element extends along the axial direction of the battery core and penetrates the battery core.

3. The battery according to claim 1, characterized in that The central axis of the heat exchange element coincides with the central axis of the shell; and / or, The central axis of the heat exchange element coincides with the central axis of the battery core.

4. The battery according to claim 1, characterized in that The battery further includes an electrode lead-out member, which is located outside the housing and is conductively connected to the heat exchange member.

5. The battery according to claim 4, characterized in that The two end caps located at the two ends of the shell body are respectively a first end cap and a second end cap, and the electrode lead-out member includes a first electrode lead-out member; The first end of the heat exchange member passes through the first end cover and is conductively connected to the first electrode lead-out member, and the first end of the heat exchange member is insulated from the first end cover; The second end of the heat exchange element is insulated from the second end cover.

6. The battery according to claim 5, characterized in that The battery also includes an intermediate connector, one end of which is located in the accommodating cavity and is conductively connected to the first electrode tab of the battery cell, the other end of which passes through the first end cover and is conductively connected to the first electrode lead-out piece, the heat exchanger is conductively connected to the intermediate connector, and the intermediate connector is insulated from the first end cover.

7. The battery according to claim 6, characterized in that The intermediate connecting member includes a sleeve portion and a protrusion protruding outward from the sleeve portion radially along the sleeve portion, the sleeve portion is sleeved on the heat exchange member and is conductively connected to the heat exchange member, the protrusion is located in the accommodating cavity and is conductively connected to the first pole ear of the battery cell, and the first electrode lead-out member is conductively connected to one end of the sleeve portion away from the protrusion.

8. The battery according to claim 7, characterized in that The battery also includes a first insulating structure, the first electrode lead-out piece is sleeved on the sleeve portion, the protrusion, the sleeve portion and the first electrode lead-out piece jointly define a first groove, a portion of the first end cover is located in the first groove, and the first insulating structure is located in the first groove to insulate the intermediate connector and the first electrode lead-out piece from the first end cover.

9. The battery according to any one of claims 5 to 8, characterized in that: The electrode lead-out member further includes a second electrode lead-out member, and the second end of the heat exchange member passes through the second end cover and is conductively connected to the second electrode lead-out member.

10. The battery according to claim 9, characterized in that The battery further includes a second insulating structure, which is mounted on the heat exchange member and is used to insulate the heat exchange member and the second electrode lead-out member from the second end cover.

11. The battery according to claim 10, characterized in that The heat exchanger is provided with a limiting portion protruding outward from the heat exchanger along the radial direction of the heat exchanger, the limiting portion is located in the accommodating cavity, the second electrode lead-out piece is sleeved on the heat exchanger, the limiting portion, the second electrode lead-out piece and the heat exchanger jointly define a second groove, part of the second end cover is located in the second groove, and the second insulating structure is arranged in the second groove.

12. The battery according to claim 11, characterized in that The limiting portion is located between the second end cover and the battery cell, a side of the limiting portion close to the battery cell abuts against the battery cell, and a third insulating structure is provided between the battery cell and the limiting portion.

13. The battery according to any one of claims 5 to 8, characterized in that: The second end of the heat exchange element is located in the accommodating cavity and has a gap with the second end cover.

14. The battery according to any one of claims 1 to 8, characterized in that The heat exchange element is a heat exchange tube, and a flow channel for a heat exchange medium to flow through is formed in the heat exchange tube; or, The heat exchange element is a solid heat exchange column.

15. The battery according to any one of claims 1 to 8, characterized in that The battery also includes a first adapter and a second adapter; The first pole lug of the battery cell is conductively connected to the first adapter plate, the first adapter plate is conductively connected to the heat exchange element, the second pole lug of the battery cell is conductively connected to the second adapter plate, and the second adapter plate is conductively connected to the housing.

16. The battery according to claim 15, characterized in that The first adapter plate is located between the first end of the battery cell and an end cover close to the first end of the battery cell, and the second adapter plate is located between the second end of the battery cell and an end cover close to the second end of the battery cell.

17. A battery pack, characterized in that: A battery comprising the battery according to any one of claims 1 to 16.

18. An electrical equipment, characterized in that: A battery comprising any one of claims 1 to 16; or A battery pack comprising the battery pack of claim 17.

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