Battery pack and electric equipment

Abstract

The battery pack comprises a battery cell unit and a heat exchange structure, the positive electrode and the negative electrode of the battery cell unit are both located at the first end of the battery pack, the heat exchange structure is used for conducting heat exchange on the battery cell unit, the heat exchange structure is provided with a flow channel, and an inlet and an outlet of the flow channel are both located at the second end of the battery pack; the inlet and the outlet of the flow channel of the heat exchange structure and the positive electrode and the negative electrode of the battery cell unit are respectively arranged at two different ends of the battery pack, so that the arrangement is reasonable, the space utilization rate of the battery pack is high, the installation and the later maintenance are convenient, condensed water appearing on the heat exchange structure is not easy to contact with the electrodes, and the service life of the battery pack is prolonged. And the risk of short circuit of the battery pack is effectively 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 new energy vehicle industry is developing rapidly. As the power source of new energy vehicles, batteries are the core components of electric vehicles and determine the quality of new energy vehicles. Batteries can adjust the temperature through heat exchange structures. The water inlet or outlet pipes of the heat exchange structure that adjusts the temperature usually produce condensed water. If the condensed water produced by the heat exchange structure contacts the electrodes of the battery cell unit of the battery pack, the battery pack circuit is prone to short circuit. Utility Model Content

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

[0004] In order to achieve the above object, the present disclosure provides a battery pack, including a battery cell unit and a heat exchange structure.

[0005] The positive electrode and the negative electrode of the battery cell unit are both located at the first end of the battery pack;

[0006] The heat exchange structure is used for exchanging heat for the battery core unit. The heat exchange structure is provided with a flow channel, and the inlet and outlet of the flow channel are both located at the second end of the battery pack.

[0007] Optionally, the first end and the second end are opposite ends of the battery pack.

[0008] Optionally, the first end and the second end are two opposite ends of the battery pack located in a first direction;

[0009] The battery cell unit includes a plurality of rows of battery cells arranged along a second direction;

[0010] The heat exchange structure comprises a plurality of heat exchange plates, the plurality of heat exchange plates are arranged in parallel along the second direction, and at least one row of the battery cells is provided between two adjacent heat exchange plates;

[0011] The flow channel is arranged in the heat exchange plate;

[0012] The second direction intersects with the first direction.

[0013] Optionally, the heat exchange plate is suitable for contacting with a wide surface of a battery cell in the battery cell unit.

[0014] Optionally, the heat exchange plate includes a main body and a first end portion;

[0015] The main body is provided with a first flow channel and a second flow channel which are independent of each other, the first flow channel penetrates the main body along the first direction, and the second flow channel penetrates the main body along the first direction;

[0016] The first end portion is disposed at one end of the main body portion located in the first direction, and a third flow channel is disposed at the first end portion. Two ends of the third flow channel are respectively connected to the first flow channel and the second flow channel.

[0017] Optionally, the heat exchange plate further includes a second end portion, and the heat exchange structure further includes an inlet pipe and an outlet pipe;

[0018] The second end portion is disposed at the other end of the main body portion in the first direction;

[0019] The second end is provided with the inlet and the outlet;

[0020] The introduction pipe is in communication with the inlet so as to introduce the heat exchange medium into the flow channel;

[0021] The outlet pipe is in communication with the outlet so as to lead the heat exchange medium out of the flow channel.

[0022] Optionally, the battery pack further comprises two electrical connectors;

[0023] One of the two electrical connectors is suitable for electrically connecting the positive electrode of the battery cell unit with a target electrical component;

[0024] The other of the two electrical connectors is suitable for electrically connecting the negative electrode of the battery cell unit with a target electrical component.

[0025] Optionally, the first end is an end of the battery pack located in a first direction;

[0026] The electrical connector has a connection point connected to the target electrical component;

[0027] In the first direction, the connection point is spaced apart from an end of the heat exchange structure close to the electrical connector.

[0028] Optionally, the electrical connector includes a first section and a second section;

[0029] One end of the first segment is suitable for connecting to the positive electrode or the negative electrode of the battery cell unit, the other end of the first segment is connected to one end of the second segment, and the first segment at least has an extension portion extending along the first direction;

[0030] The other end of the second section is provided with the connection point.

[0031] Optionally, in the height direction of the battery pack, the connection point is located higher than the top of the heat exchange structure.

[0032] Optionally, the second section has a second section extension;

[0033] The second extension portion extends along a height direction of the battery pack, and the connection point is disposed at a top end of the second extension portion.

[0034] Optionally, the battery pack further comprises a battery tray, wherein the battery tray comprises a bottom plate and a frame arranged on the bottom plate;

[0035] The frame includes a side frame located in a first direction, the side frame is provided with a first through hole and a second through hole, and the heat exchange structure includes an inlet pipe and an outlet pipe;

[0036] The inlet pipe is disposed through the first through hole and communicated with the inlet of the flow channel;

[0037] The outlet pipe is disposed through the second through hole and is communicated with the outlet of the flow channel.

[0038] Optionally, the battery pack further includes a battery pack explosion-proof valve, and the side frame is further provided with a third through hole;

[0039] The bottom plate and the frame can define a storage space, and the battery cell unit is located in the storage space;

[0040] One end of the third through hole is in communication with the accommodation space, or one end of the third through hole is in communication with a battery cell explosion-proof valve in the battery cell unit through an air passage;

[0041] The other end of the third through hole is connected to the battery pack explosion-proof valve.

[0042] According to a second aspect of the present disclosure, there is provided an electrical device, comprising a device body and the battery pack, wherein the battery pack is mounted on the device body and is used to supply power to the device body.

[0043] Through the above technical scheme, the inlet and outlet of the flow channel of the heat exchange structure and the positive and negative electrodes of the battery cell unit are respectively arranged at the first end and the second end of the battery pack, and are located at different ends. This not only makes the space utilization rate of the battery pack high, but also facilitates installation and subsequent maintenance. In addition, it is also beneficial to make the pipelines connected to the inlet and outlet for the heat exchange medium to enter and exit the heat exchange structure and the electrodes of the battery cell unit located at different ends, which is beneficial to make the condensed water on the heat exchange structure not easy to contact the electrodes, and can effectively reduce or even avoid the risk of short circuit of the battery pack caused by this.

[0044] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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:

[0046] Figure 1 is a schematic structural diagram of various components of a battery pack provided by an exemplary embodiment of the present disclosure in an exploded state, wherein a first direction, a second direction, a first end, and a second end of the battery pack are shown;

[0047] Figure 2 is a structural schematic diagram of another perspective of various components of a battery pack provided by an exemplary embodiment of the present disclosure in an exploded state, wherein a first direction, a second direction, a first end, and a second end of the battery pack are shown;

[0048] Figure 3 yes Figure 2 A schematic diagram of an enlarged view of part A in FIG.

[0049] Figure 4 is a structural schematic diagram of a heat exchange structure provided by an exemplary embodiment of the present disclosure;

[0050] Figure 5 is a schematic structural diagram of a heat exchange structure and a battery cell unit in an assembled state provided by an exemplary embodiment of the present disclosure, wherein an electrical connector is shown;

[0051] Figure 6 It is a schematic structural diagram of a side frame provided in an exemplary embodiment of the present disclosure.

[0052] Description of Reference Numerals

[0053] 100. battery pack, 10. battery cell unit, 11. battery cell, 20. heat exchange structure, 21. heat exchange body, 211. heat exchange plate, 2111. main body, 2112. first end, 2113. second end, 22. inlet pipe, 23. outlet pipe, 24. inlet pipe, 25. outlet pipe, 30. electrical connector, 31. first section, 32. second section, 321. second section extension, 33. vertical extension section, 34. connection point, 40. battery tray, 41. bottom plate, 42. frame, 421. side frame, 4211. first through hole, 4212. second through hole, 4213. third through hole, 43. accommodating space, 50. upper cover. DETAILED DESCRIPTION

[0054] The specific embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0055] In the present disclosure, unless otherwise stated, the directional words used, such as "upper, lower, top, bottom", are usually defined in terms of the drawing direction of the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and 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, and therefore cannot be understood as a limitation of the present disclosure. The terms "inside" and "outside" refer to the inside and outside of the corresponding structural contour.

[0056] “First direction”, “second direction”, “first end”, “second end” can refer to Figure 1 and Figure 2 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 and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0057] 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.

[0058] Research has found that the battery can regulate temperature through a heat exchange structure. When the temperature of the heat exchange structure changes, condensation water will usually be generated on the outer wall. If the heat exchange structure and the battery pack electrode are arranged on the same side, the condensation water may come into contact with the electrical connector, electrode terminal and other positions, and a short circuit may occur at the battery cell position, thereby causing a short circuit failure of the battery pack.

[0059] In view of this, if Figures 1 to 6 As shown, the present disclosure provides a battery pack, which may include a battery cell unit 10 and a heat exchange structure 20. The positive electrode and the negative electrode of the battery cell unit 10 are both located at the first end of the battery pack 100. The heat exchange structure 20 is used to exchange heat for the battery cell unit 10. The heat exchange structure 20 is provided with a flow channel, and the inlet and outlet of the flow channel are both located at the second end of the battery pack 100.

[0060] In the present disclosure, the battery cell unit 10 may be a battery cell module formed by connecting a plurality of battery cells 11 in series. All battery cells 11 in one battery cell unit 10 may be connected in series. The battery cell unit 10 has a positive electrode and a negative electrode connected to an external device.

[0061] The heat exchange structure 20 can be used to exchange heat with the battery cell unit 10 to achieve cooling or heating of the battery cell unit 10. The heat exchange structure 20 can use structures such as liquid cooling plates and air cooling pipes. The flow channel can be used to accommodate the heat exchange medium, and the inlet and outlet of the flow channel can be used for the pipeline for the heat exchange medium to enter and exit the heat exchange structure 20 (such as the inlet pipe 22 and the outlet pipe 23 described below). The flow channel can use a hollow pipe or other hollow structure.

[0062] The positive and negative electrodes of the battery cell unit 10 are conductive, which is equivalent to conductive points. If the conductive points are arranged at the same end as the heat exchange structure 20, condensed water will be generated when the temperature of the inlet pipe 22 and the outlet pipe 23 of the heat exchange structure 20 changes. The conductive points of the positive and negative electrodes of the battery cell unit 10 are easy to contact with the condensed water, which may easily cause internal short circuit problems in the battery pack 100.

[0063] By arranging the positive and negative electrodes of the battery cell unit 10 at the first end of the battery pack 100, and the inlet and outlet of the flow channel of the heat exchange structure 20 at the second end of the battery pack 100, the two are arranged at different ends, which is beneficial for the pipes connected to the inlet and outlet for the heat exchange medium to enter and exit the heat exchange structure 20 (such as the inlet pipe 22 and the outlet pipe 23) and the electrodes of the battery cell unit 10 to be located at different ends. This is beneficial for preventing the condensed water on the heat exchange structure 20 from easily contacting the electrodes, which can effectively reduce or even avoid the risk of short circuit of the battery pack 100 caused by this.

[0064] In addition, the electrodes of each of the multiple battery cell units 10 are located at the first end of the length direction of the battery pack 100, and are arranged separately from the heat exchange structure 20 arranged at the second end of the length direction of the battery pack 100, which is beneficial to the reasonable arrangement of the heat exchange structure 20 and the electrode lead-out parts of the battery cell units 10, with high space utilization and convenient installation and subsequent maintenance.

[0065] The heat exchange medium here can be gas or liquid, and the present disclosure does not limit this.

[0066] In the present disclosure, the first end and the second end can be two opposite ends of the battery pack, or two adjacent ends, as long as the positive and negative electrodes of the battery cell unit 10 and the inlet and outlet of the flow channel of the heat exchange structure 20 are not arranged at the same end.

[0067] Alternatively, if Figure 1 and Figure 2 As shown, the first end and the second end may be opposite ends of the battery pack 100. Such a design is conducive to making the positive and negative electrodes of the battery cell unit 10 and the inlet and outlet of the flow channel of the heat exchange structure 20 far apart, thereby ensuring that condensed water on the heat exchange structure 20 is not easy to contact the electrodes.

[0068] like Figures 1 to 5As shown, the first end and the second end may be the opposite ends of the battery pack 100 in the first direction, the battery cell unit 10 includes multiple columns of battery cells 11 arranged along the second direction, the heat exchange structure 20 may include a heat exchange body 21, the heat exchange body 21 may include multiple heat exchange plates 211, multiple heat exchange plates 211 are arranged in parallel along the second direction, at least one column of battery cells 11 is provided between two adjacent heat exchange plates 211, and a flow channel is provided in the heat exchange plate 211, wherein the second direction intersects with the first direction. One or more columns of battery cells 11 are provided between the two heat exchange plates 211, as long as the cooling requirements of the battery pack 100 can be met, and the function of the heat exchange plate 211 is to adjust the temperature of the battery cell unit 10. Since multiple heat exchange plates 211 are arranged in parallel, different heat exchange plates 211 will not affect each other, and the cooling effect can be guaranteed.

[0069] like Figure 5 As shown, the heat exchange plate 211 separates the two columns of battery cells 11. The heat exchange plate 211 has a flow channel inside. The heat exchange medium can enter the heat exchange plate 211 from the first flow channel to cool down or heat up the heat exchange plate 211, thereby cooling or heating the battery cells 11. Then, the heat exchange medium flows out from the second flow channel of the heat exchange plate 211 to complete the heat exchange of the heat exchange plate 211.

[0070] Here, the second direction may intersect the first direction at a vertical angle or at another angle, and may be designed according to the arrangement of the battery cells 11 of the battery pack 100, which is not limited in the present disclosure. Figure 1 and Figure 2 As shown, the second direction may intersect the first direction perpendicularly. This arrangement is reasonable and neatly arranged, and is convenient for design and installation.

[0071] In the present disclosure, adjacent battery cells 11 in a battery cell unit 10 can be connected through a connecting row, and the heat exchange plate 211 separates two columns of battery cells 11. In order to prevent condensed water on the heat exchange plate 211 from affecting the connecting row, the top of the heat exchange plate 211 can be set to be lower than the top of the battery cell 11, that is, in the height direction of the battery pack 100, the height of the top of the heat exchange plate 211 can be lower than the height of the top of the battery cell 11.

[0072] In this disclosure, Figure 5 As shown, the heat exchange plate 211 can contact the wide surface of the battery cell 11 in the battery cell unit 10. The heat exchange plate 211 contacts the wide surface of the battery cell 11, and the contact area is larger, which can ensure a good effect of adjusting the temperature.

[0073] It can be understood that, here, the wide side of the battery cell 11 refers to a surface with a relatively larger area among multiple surfaces located in the length direction of the battery cell 11. For example, when the battery pack is installed at the bottom of the vehicle, for a square battery cell with the length direction as the first direction, the wide side of the battery cell 11 is a surface defined by the edges in the length direction and the height direction of the battery cell 11.

[0074] The present disclosure does not limit the specific structure of the heat exchange plate 211. Figure 4 As shown, in one embodiment of the present disclosure, the heat exchange plate 211 may include a main body 2111 and a first end 2112, and the main body 2111 may be provided with a first flow channel and a second flow channel that are independent of each other, the first flow channel penetrates the main body 2111 along the first direction, the second flow channel penetrates the main body 2111 along the first direction, the first end 2112 is provided at one end of the main body 2111 in the first direction, the first end 2112 is provided with a third flow channel, and the two ends of the third flow channel may be connected to the first flow channel and the second flow channel respectively. The main body 2111 and the first end 2112 of the heat exchange plate 211 are provided separately, so that the circuitous flow channel can be easily processed, the third flow channel is provided on the first end 2112, and two spaced first and second flow channels are provided on the main body 2111, without considering the intermediate circuitous part connecting the two flow channels, which is convenient for design and processing.

[0075] Here, the first end portion 2112 can be sleeved on the main body portion 2111, and one end of the third flow channel in the first end portion 2112 is connected to the first flow channel in the main body portion 2111, and the other end is connected to the second flow channel in the main body portion 2111, so that the first flow channel is connected to the second flow channel.

[0076] In this disclosure, Figure 4 As shown, the heat exchange plate 211 may also include a second end 2113, and the heat exchange structure 20 may also include an inlet pipe 22 and an outlet pipe 23. The second end 2113 is disposed at the other end of the main body 2111 in the first direction. The second end 2113 is provided with an inlet and an outlet. The inlet pipe 22 is connected to the inlet for introducing the heat exchange medium into the flow channel, and the outlet pipe 23 is connected to the outlet for leading the heat exchange medium out of the flow channel. The function of the second end 2113 is to install the inlet pipe 22 and the outlet pipe 23 and connect the inlet pipe 22 and the outlet pipe 23 with the corresponding flow channel. That is, in addition to the heat exchange main body 21, the heat exchange structure 20 may also include an inlet pipe 22 and an outlet pipe 23.

[0077] Here, the inlet and outlet of the second end portion 2113 are arranged in the up-down direction (ie, the height direction of the battery pack 100), correspondingly, see Figure 4 , the inlet pipe 22 and the outlet pipe 23 can be arranged in the up-down direction. Since the thickness of the second end portion 2113 in the second direction is small, it is convenient to arrange the up-down structure in the height direction. The up-down position of the inlet and the outlet is not limited here, that is, the up-down position of the inlet pipe 22 and the outlet pipe 23 is not limited.

[0078] like Figure 4 and Figure 5As shown, the inlets of the plurality of heat exchange plates 211 can be connected to the inlet pipe 22, respectively, and the outlets of the plurality of heat exchange plates 211 can be connected to the outlet pipe 23, respectively. The inlet pipe 22 and the outlet pipe 23 are connected to each heat exchange plate 211 separately, so that the pipeline can be shared in the inlet area or the outlet area. Since the area for heat exchange of the battery cell 11 (the area of ​​the heat exchange plate 211) is independent, the structure can be simplified without affecting the mutual cooling effect.

[0079] In this disclosure, Figure 5 As shown, the battery pack 100 may also include two electrical connectors 30, one of the two electrical connectors 30 is suitable for electrically connecting the positive electrode of the battery cell unit 10 to the target electrical component, and the other of the two electrical connectors 30 is suitable for electrically connecting the negative electrode of the battery cell unit 10 to the target electrical component. Among them, the target electrical component can be any suitable electrical component, and the present disclosure is not limited to this. For example, it can be a high-voltage distribution box, in which case, one of the two electrical connectors 30 is suitable for electrically connecting the positive electrode of the battery cell unit 10 to the positive terminal of the high-voltage distribution box, and the other of the two electrical connectors 30 is suitable for electrically connecting the negative electrode of the battery cell unit 10 to the negative terminal of the high-voltage distribution box. Providing the electrical connector 30 can facilitate the connection of the positive and negative electrodes of the battery cell unit 10 to the target electrical component (high-voltage distribution box) in actual use.

[0080] The high-voltage distribution box is a battery energy distribution unit, which is an important component of the high-voltage circuit of the power-consuming equipment (such as a vehicle). The battery energy distribution unit can distribute the high-voltage electricity of the battery pack 100 to the power-consuming equipment, so that the battery pack 100 can supply power to the power-consuming equipment. In addition, the high-voltage distribution box can distribute the high-voltage charging current of the DC charging interface to the battery pack 100 to charge the battery pack 100.

[0081] like Figure 3 and Figure 5 As shown, the electrodes of multiple battery cell units 10 can be located at the first end of the first direction of the battery pack 100, and arranged separately from the inlet tube 22 and the outlet tube 23 arranged at the second end of the first direction of the battery pack 100. This is conducive to the reasonable arrangement of the inlet tube 22, the outlet tube 23 and the electrical connectors 30 of the battery cell unit 10, which can not only prevent the condensed water generated by the inlet tube 22 and the outlet tube 23 from affecting the electrodes of the battery cell unit 10, but also the arrangement has high space utilization and is convenient for installation and subsequent maintenance.

[0082] In this disclosure, Figure 3 and Figure 5As shown, the first end may be an end of the battery pack 100 located in the first direction, and the electrical connector 30 has a connection point 34 connected to the corresponding connection end of the target electrical component (such as the positive terminal or the negative terminal of the high-voltage distribution box). In the first direction, the connection point 34 is spaced apart from the end of the heat exchange structure 20 (such as the heat exchange body 21) close to the electrical connector 30. This arrangement can make the connection point 34 and the heat exchange structure 20 (such as the heat exchange body 21) at least spaced apart in the first direction, which is conducive to preventing the condensed water generated on the heat exchange structure 20 (such as the heat exchange body 21) from affecting the connection point 34.

[0083] In order to make the connection point 34 and the heat exchange structure 20 (such as the heat exchange body 21) have a spacing in the first direction, in the present disclosure, as Figure 3 and Figure 5 As shown, the electrical connector 30 may include a first section 31 and a second section 32, one end of the first section 31 is suitable for connecting to the positive electrode or the negative electrode of the battery cell unit 10, the other end of the first section 31 is connected to one end of the second section 32, the first section 31 at least has an extension portion extending along the first direction, and the other end of the second section 32 is provided with a connection point 34. By providing the extension portion extending along the first direction, the electrical connector 30 can be spaced from the end of the heat exchange structure 20 (such as the heat exchange body 21) on the same side, thereby preventing the condensed water generated on the heat exchange structure 20 (such as the heat exchange body 21) from affecting the connection point 34. The connection point 34 can be used to be electrically connected to the high-voltage distribution box.

[0084] In the present disclosure, optional, such as Figure 3 As shown, in the height direction of the battery pack 100, the connection point 34 is located higher than the top of the heat exchange structure (such as the heat exchange body 21). Since the condensed water of the heat exchange structure 20 generally falls by gravity, setting the connection point 34 to be higher than the top of the heat exchange structure 20 (such as the heat exchange body 21) is helpful to prevent the condensed water from falling on the connection point 34 under the action of gravity, and can further prevent the condensed water generated on the heat exchange structure 20 (such as the heat exchange body 21) from affecting the connection point 34.

[0085] In order to make the connection point 34 and the heat exchange structure 20 (such as the heat exchange body 21) have a gap in the height of the battery pack 100, in the present disclosure, it is optional, such as Figure 3 As shown, the second section 32 has a second extension portion 321, which extends along the height direction of the battery pack 100, and a connection point 34 is provided at the top of the second extension portion 321. This design can ensure that the connection point 34 is as high as possible than the heat exchange structure 20 when the space of the battery pack 100 allows, so as to prevent the condensed water generated on the heat exchange structure 20 (such as the heat exchange body 21) from falling under the action of gravity and affecting the connection point 34.

[0086] like Figure 3 As shown, the first section 31 may also include a vertical extension section 33, which is connected between the electrode (positive or negative electrode) of the battery cell 11 and the first section 31, and the vertical extension section 33 extends toward the lower end along the height direction of the battery pack 100, and the second section 32 extends toward the center line of the second direction of the battery pack 100, and the second section extension portion 321 extends toward the upper end along the height direction of the battery pack 100. The entire electrical connector 30 is a bent part, which can leave enough space for connecting wires in actual applications to prevent interference.

[0087] In the present disclosure, except for the connection point 34 on the electrical connector 30 which is designed as a conductive structure, the remaining positions can be provided with insulating members for wrapping, which can effectively prevent the short circuit problem of the circuit.

[0088] In this disclosure, Figure 1 and Figure 6 As shown, the battery pack 100 may also include a battery tray 40, the battery tray 40 includes a bottom plate 41 and a frame 42 disposed on the bottom plate 41, the frame 42 includes a side frame 421 located in the first direction, the side frame 421 is provided with a first through hole 4211 and a second through hole 4212, the heat exchange structure 20 includes an inlet pipe 24 and an outlet pipe 25, the inlet pipe 24 is passed through the first through hole 4211 and is connected to the inlet, the outlet pipe 25 is passed through the second through hole 4212 and is connected to the outlet. The side frame 421 is arranged at the first end of the battery pack 100 in the first direction, the first through hole 4211 and the second through hole 4212 of the side frame 421 are connected to the inlet pipe 24 and the outlet pipe 25, and the arrangement of the inlet pipe 24 and the outlet pipe 25 can be integrated, the arrangement has high space utilization, and is also convenient for installation and later maintenance.

[0089] like Figure 1 As shown, the battery pack 100 may further include a battery tray 40. The battery tray 40 may include a bottom plate 41 and a frame 42. The lower end of the frame 42 is connected to the edges of the bottom plate 41 structure. The battery tray 40 and the frame 42 together define a receiving space 43 for receiving the battery cell 11.

[0090] like Figure 1 and Figure 4 As shown, one end of the inlet pipe 24 is connected to the introduction pipe 22, and the other end is fixed in the first through hole 4211 and extends out of the battery tray 40. The inlet pipe 24 can be used to connect a device that provides a heat exchange medium to input the heat exchange medium into the flow channel of the heat exchange plate 211. Similarly, one end of the outlet pipe 25 is connected to the lead-out pipe 23, and the other end is fixed on the second through hole 4212 and extends out of the battery tray 40, which can be used to output the heat exchange medium flowing out of the flow channel.

[0091] like Figure 1 and Figure 6As shown, optionally, the battery pack 100 also includes a battery pack explosion-proof valve, and a third through hole 4213 is further provided on the side frame 421. The bottom plate 41 and the frame 42 can define a accommodating space 43. The battery cell unit 10 is located in the accommodating space 43. One end of the third through hole 4213 is connected to the accommodating space 43, or one end of the third through hole 4213 is connected to the explosion-proof valve of the battery cell 11 in the battery cell unit 10 through an airway, and the other end of the third through hole 4213 is connected to the explosion-proof valve.

[0092] By providing the third through hole 4213 on the side frame 421 to install the battery pack explosion-proof valve, the battery pack explosion-proof valve can be integrated on the side frame 421. In this way, on the one hand, it is beneficial to keep the battery pack explosion-proof valve away from the positive and negative electrodes (electrical connectors) of the battery cell unit, avoid the battery pack explosion-proof valve from affecting the positive and negative electrodes of the battery cell unit, and further improve the safety of the battery pack 100. On the other hand, since the first through hole 4211, the second through hole 4212, and the third through hole 4213 are all provided on the side frame 421 and located at the same end of the battery pack 100, it is beneficial to reasonably design the positions of the first through hole 4211, the second through hole 4212, and the third through hole 4213 as needed, and during installation, the outlet pipe, the inlet pipe, and the battery pack explosion-proof valve can also be uniformly installed on the side frame 421.

[0093] Arranging the battery pack explosion-proof valve on the side frame 421 of the battery pack 100 in the first direction can also save the size of the battery pack 100 in the width direction. When the battery pack 100 is applied to a vehicle, the width space is relatively compact, and this design facilitates the installation of the battery pack 100 when it is used.

[0094] In the present disclosure, the battery pack 100 may further include an upper cover 50, which defines a receiving space 43 together with the battery tray 40. Optionally, when the battery pack 100 is suitable for a vehicle, the upper cover 50 is suitable for being arranged on the lower side of the vehicle's floor, or the upper cover 50 is suitable for being used as part of the vehicle's floor, that is, the upper cover 50 may be located separately under the vehicle's floor, or may be used as the vehicle's floor. In the latter case, it is beneficial to increase the Z-direction installation space of the battery pack of the vehicle, allowing the installation of a larger capacity battery, which is beneficial to increasing the vehicle's cruising range.

[0095] According to a second aspect of the present disclosure, there is provided an electrical device, comprising a device body and a battery pack, wherein the battery pack is mounted on the device body and is used to supply power to the device body.

[0096] Here, the electrical equipment may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, which are not limited in the present disclosure.

[0097] Optionally, when the electrical device is a vehicle, the battery pack disclosed herein can be installed on the body of the vehicle to provide power for driving the vehicle.

[0098] 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.

[0099] It should also be noted that the various specific technical features described in the above specific implementation methods can be combined in any suitable manner without contradiction.

[0100] 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: Including battery cell unit and heat exchange structure, The positive electrode and the negative electrode of the battery cell unit are both located at the first end of the battery pack; The heat exchange structure is used for exchanging heat for the battery core unit. The heat exchange structure is provided with a flow channel, and the inlet and outlet of the flow channel are both located at the second end of the battery pack.

2. The battery pack according to claim 1, characterized in that: The first end and the second end are opposite ends of the battery pack.

3. The battery pack according to claim 1, characterized in that: The first end and the second end are two opposite ends of the battery pack located in a first direction; The battery cell unit includes a plurality of rows of battery cells arranged along a second direction; The heat exchange structure comprises a plurality of heat exchange plates, the plurality of heat exchange plates are arranged in parallel along the second direction, and at least one row of the battery cells is provided between two adjacent heat exchange plates; The flow channel is arranged in the heat exchange plate; The second direction intersects with the first direction.

4. The battery pack according to claim 3, characterized in that: The heat exchange plate is suitable for contacting with the wide surface of the battery cell in the battery cell unit.

5. The battery pack according to claim 3, characterized in that: The heat exchange plate comprises a main body and a first end portion; The main body is provided with a first flow channel and a second flow channel which are independent of each other, the first flow channel penetrates the main body along the first direction, and the second flow channel penetrates the main body along the first direction; The first end portion is disposed at one end of the main body portion located in the first direction, and a third flow channel is disposed at the first end portion. Two ends of the third flow channel are respectively connected to the first flow channel and the second flow channel.

6. The battery pack according to claim 5, characterized in that: The heat exchange plate further includes a second end portion, and the heat exchange structure further includes an inlet pipe and an outlet pipe; The second end portion is disposed at the other end of the main body portion in the first direction; The second end is provided with the inlet and the outlet; The introduction pipe is in communication with the inlet so as to introduce the heat exchange medium into the flow channel; The outlet pipe is in communication with the outlet so as to lead the heat exchange medium out of the flow channel.

7. The battery pack according to any one of claims 1 to 6, characterized in that: The battery pack also includes two electrical connectors; One of the two electrical connectors is suitable for electrically connecting the positive electrode of the battery cell unit with a target electrical component; The other of the two electrical connectors is suitable for electrically connecting the negative electrode of the battery cell unit with a target electrical component.

8. The battery pack according to claim 7, characterized in that: The first end is an end of the battery pack located in a first direction; The electrical connector has a connection point connected to the target electrical component; In the first direction, the connection point is spaced apart from an end of the heat exchange structure close to the electrical connector.

9. The battery pack according to claim 8, characterized in that: The electrical connector includes a first section and a second section; One end of the first segment is suitable for connecting to the positive electrode or the negative electrode of the battery cell unit, the other end of the first segment is connected to one end of the second segment, and the first segment at least has an extension portion extending along the first direction; The other end of the second section is provided with the connection point.

10. The battery pack according to claim 9, characterized in that: In the height direction of the battery pack, the connection point is located higher than the top of the heat exchange structure.

11. The battery pack according to claim 10, characterized in that: The second section has a second section extension; The second extension portion extends along a height direction of the battery pack, and the connection point is disposed at a top end of the second extension portion.

12. The battery pack according to any one of claims 1 to 6, characterized in that: The battery pack further comprises a battery tray, wherein the battery tray comprises a bottom plate and a frame arranged on the bottom plate; The frame includes a side frame located in a first direction, the side frame is provided with a first through hole and a second through hole, and the heat exchange structure includes an inlet pipe and an outlet pipe; The inlet pipe is disposed through the first through hole and communicated with the inlet of the flow channel; The outlet pipe is disposed through the second through hole and is communicated with the outlet of the flow channel.

13. The battery pack according to claim 12, characterized in that: The battery pack further includes a battery pack explosion-proof valve, and the side frame is further provided with a third through hole; The bottom plate and the frame can define a storage space, and the battery cell unit is located in the storage space; One end of the third through hole is in communication with the accommodating space, or one end of the third through hole is in communication with a battery cell explosion-proof valve in the battery cell unit through an air passage; The other end of the third through hole is connected to the battery pack explosion-proof valve.

14. An electrical device, characterized in that: It comprises a device body and a battery pack according to any one of claims 1 to 13, wherein the battery pack is installed on the device body and is used to supply power to the device body.

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