Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment. The battery pack comprises a frame, a battery pack and a battery pack, the battery is arranged in the frame and comprises a plurality of single batteries, the single batteries are arranged in the first direction, the projection area of the battery in the second direction is larger than that of the battery in the third direction, and the first direction, the second direction and the third direction are perpendicular to one another in pairs; and the heating piece is arranged on the frame, and the heating piece is arranged on one side of the battery in the second direction and at least one side of the battery in the first direction and the third direction. According to the battery pack disclosed by the embodiment of the utility model, the heating pieces are arranged on the side surfaces of the battery along different directions, and one side surface provided with the heating piece is a surface with a larger area of the battery, so that a plurality of side surfaces of the battery can be heated, and the heating rate and the heating uniformity of the battery can be improved; therefore, the working performance of the battery pack in a low-temperature environment is improved, the heating piece is not easy to damage, and the battery heating effect is relatively stable.

Description

Battery packs and electrical equipment Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery pack and an electrical device. Background Technology

[0002] With the development of new energy vehicles and energy storage technologies, power battery technology is also constantly advancing, and the application of power battery systems in the automotive field is becoming increasingly widespread. Battery performance is significantly affected by temperature; battery performance drops sharply when operating at low temperatures, thus requiring battery heating. However, in related technologies, the heating rate of the battery is slow, resulting in poor battery performance in low-temperature environments, which in turn leads to a decline in the performance of vehicles using these batteries. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a battery pack with a faster heating rate, which improves the battery pack's performance in low-temperature environments, thereby improving the performance of vehicles using this battery pack.

[0004] Another objective of this invention is to provide an electrical device having the aforementioned battery pack.

[0005] A battery pack according to an embodiment of the present invention includes: a frame; a battery, the battery being disposed within the frame and comprising a plurality of battery cells, the plurality of battery cells being arranged along a first direction, the projected area of ​​the battery in a second direction being greater than the projected area of ​​the battery in a third direction, the first direction, the second direction, and the third direction being perpendicular to each other; and a heating element, the heating element being disposed on the frame, the heating element being located on one side of the battery in the second direction, and on at least one side of the battery in the first direction and the third direction.

[0006] According to the battery pack of this utility model embodiment, by providing heating elements on the sides of the battery in different directions, one of the sides with heating elements is the surface with a larger area of ​​the battery, which can heat multiple sides of the battery, thereby improving the heating rate and heating uniformity of the battery, thus improving the working performance of the battery pack in low-temperature environments, and the heating elements are not easily damaged, and the heating effect of the battery is relatively stable.

[0007] In addition, the battery pack according to the above embodiments of the present invention may also have the following additional technical features:

[0008] According to some embodiments of the present invention, the heating element is multiple and includes a first heating element, a second heating element and a third heating element. The first heating element is located on one side of the battery in the second direction, the second heating element is located on one side of the battery in the first direction, and the third heating element is located on the other side of the battery in the first direction.

[0009] According to some embodiments of the present invention, the first heating element, the second heating element, and the third heating element are separate components.

[0010] According to some embodiments of the present invention, the battery pack further includes an electronic control unit, wherein the first heating element, the second heating element and the third heating element are respectively electrically connected to the electronic control unit, and the electronic control unit is adapted to control the heating elements to heat the battery.

[0011] According to some embodiments of the present invention, the electronic control unit is located on one side of the battery in the third direction, and the first heating element, the second heating element and the third heating element are each provided with a first solder pad at one end in the third direction. The first solder pad is electrically connected to the electronic control unit through a wire harness so that the electronic control unit is electrically connected to the corresponding heating element.

[0012] According to some embodiments of the present invention, the battery pack further includes an electronic control unit, the first heating element is electrically connected to the second heating element and the third heating element respectively, one of the first heating element, the second heating element and the third heating element is electrically connected to the electronic control unit, and the electronic control unit is adapted to control the heating element to heat the battery.

[0013] According to some embodiments of the present invention, the electronic control unit is located on one side of the battery in the third direction, and the first heating element is provided with a first solder pad at one end in the third direction. The first solder pad is electrically connected to the electronic control unit through a wire harness, so that the first heating element, the second heating element and the third heating element are all electrically connected to the electronic control unit.

[0014] According to some embodiments of the present invention, the second heating element and the third heating element are each located at one end of the first heating element in a second direction, and the first heating element is provided with second pads at both ends of the first heating element and the third heating element in the first direction. The second pads of adjacent heating elements are electrically connected by wire harnesses to make adjacent heating elements electrically connected.

[0015] According to some embodiments of the present invention, the first heating element, the second heating element, and the third heating element are an integral piece.

[0016] According to some embodiments of the present invention, the frame includes a tray, a plurality of side beams and a connector, the side beams and the battery are disposed on the tray, at least two of the side beams are located on both sides of the battery in a first direction, the connector connects the two side beams and is located on one side of the battery in a second direction, and the heating element is disposed on the connector and the two side beams.

[0017] According to some embodiments of the present invention, the heating element is bonded to the side beam and the connecting element.

[0018] According to some embodiments of the present invention, the heating element is disposed on the side of the frame opposite to the battery.

[0019] According to some embodiments of the present invention, the battery cell includes a body and a terminal post, the terminal post being located on the side of the body facing the third direction, and the heating element being multiple and including a fourth heating element, the fourth heating element being located on the other side of the body facing the third direction.

[0020] According to some embodiments of the present invention, the plurality of heating elements further includes a fifth heating element, which is located on opposite sides of the battery along with the fourth heating element.

[0021] According to some embodiments of the present invention, the heating element is a heating film, which is adapted to cover the surface of the battery.

[0022] The electrical equipment according to an embodiment of the present invention includes a battery pack according to an embodiment of the present invention.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 is a schematic diagram of the battery pack according to an embodiment of the present utility model, wherein the first heating element, the second heating element and the third heating element are electrically connected to the electronic control unit respectively;

[0026] Figure 2 is a magnified view of a portion of area A marked in Figure 1;

[0027] Figure 3 is a magnified view of the area marked B in Figure 1;

[0028] Figure 4 is a magnified view of the area marked C in Figure 1;

[0029] Figure 5 is a schematic diagram of the battery pack in Figure 1 from another perspective, showing the second heating element;

[0030] Figure 6 is a schematic diagram of the structure of a battery pack according to another embodiment of the present invention, wherein one of the first heating element, the second heating element and the third heating element is electrically connected to the electronic control unit;

[0031] Figure 7 is a magnified view of the area marked D in Figure 6;

[0032] Figure 8 is a magnified view of the area marked E in Figure 6;

[0033] Figure 9 is a schematic diagram of the battery pack in Figure 6 from another perspective, showing the second heating element;

[0034] Figure 10 is a circuit diagram of the battery pack in Figure 1;

[0035] Figure 11 is a circuit diagram of the battery pack in Figure 6;

[0036] Figure 12 is a schematic diagram of an electrical device for a vehicle according to an embodiment of the present invention.

[0037] Figure label:

[0038] Battery pack 100; Electrical equipment 200;

[0039] Frame 10; Pallet 11; Side beam 12; Connector 13;

[0040] Battery 20; Battery cell 21; Main body 211; Terminal post 212;

[0041] Heating element 30; First heating element 31; Second heating element 32; Third heating element 33;

[0042] Electrical control unit 40; wiring harness 41; first pad 421; second pad 422;

[0043] Battery monitoring manager 401; Vehicle low-voltage connector 402; Dual electronic control plug-in 403; Boost relay 404; Main positive relay 405; Pre-charge resistor 406; Pre-charge relay 407; Heating relay 408; DC charging connector 409; Fast charging relay 410; DC charging fuse 411; Dual electronic control fuse 412; High-voltage monitoring module 413; Main negative relay 414; Heating fuse 415. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] In the description of this utility model, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "first feature above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0047] Battery performance is significantly affected by temperature. When batteries operate at low temperatures, their performance drops sharply. In particular, when batteries are in environments below 0°C, they cannot be charged, leading to problems such as insufficient power, insufficient driving range, and limited charging in vehicles using these batteries in low-temperature environments.

[0048] Based on this, this application proposes a battery pack, which includes a frame, a battery, and a heating element. The heating element can heat the battery inside the frame to increase the battery temperature and keep the battery temperature within a suitable range, which is beneficial to improving battery performance and facilitating battery charging. This, in turn, helps to improve the vehicle's power performance in low-temperature environments, extend the vehicle's driving range, and reduce charging limitations.

[0049] The battery pack 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0050] Referring to Figures 1-11, the battery pack 100 according to an embodiment of the present invention may include a frame 10, a battery 20, and a heating element 30.

[0051] Specifically, the battery 20 is housed within the frame 10, and the battery pack 100 includes multiple battery cells 21. The frame 10 can be used to support the battery 20 and limit the movement of the multiple battery cells 21, making the operation of the battery 20 more stable.

[0052] Multiple battery cells 21 are arranged along a first direction (e.g., the left-right direction shown in Figure 1). The projected area of ​​the battery 20 in a second direction (e.g., the up-down direction shown in Figure 1) is larger than the projected area of ​​the battery 20 in a third direction (e.g., the front-back direction shown in Figure 1). The first direction, the second direction, and the third direction are perpendicular to each other, so the projected area of ​​the battery 20 in the second direction is larger.

[0053] The heating element 30 is mounted on the frame 10 and is located on one side of the battery 20 in the second direction. The heating element 30 is also located on at least one side of the battery 20 in the first and third directions. The frame 10 is less prone to movement. Mounting the heating element 30 on the frame 10 makes its installation position more stable, resulting in a more stable heating effect on the battery 20 within the frame 10. Furthermore, when the heating element 30 needs to be replaced, it can be removed from the frame 10 for replacement, or the part of the frame 10 that connects to the heating element 30 can be replaced. Compared to mounting the heating element 30 directly on the surface of the battery 20, mounting it on the frame 10 minimizes the impact on the battery 20 during replacement, potentially eliminating the need to replace the battery 20 altogether and extending its lifespan.

[0054] The battery 20 has a large projected area in the second direction. The heating element 30 located on one side of the battery 20 in the second direction can heat a large surface area of ​​the battery 20, thus heating the entire battery 20. This allows for large-area heating of the battery 20, resulting in more uniform temperature distribution across its surface along the second direction, which improves the overall heating rate and uniformity. The battery 20 also has a heating element 30 on at least one side of both the first and second directions. For example, heating elements 30 can be located on one or both sides of the battery 20 along the first direction or one or both sides of the battery 20 along the second direction. This allows for heating at least one surface of the battery 20 along both directions. Combined with the heating element 30 located on one side of the battery 20 in the second direction, multiple surfaces of the battery 20 along different directions can be heated simultaneously, resulting in a faster heating rate and allowing for heating of different parts of the battery 20 along different directions, leading to better heating uniformity.

[0055] In some related technologies, heating elements are only provided on the upper surface of the battery, resulting in a low heating rate. Furthermore, the heating elements are directly bonded to the battery surface, which can easily cause the heating elements to detach from the battery surface or even break if the battery expands or deforms. Consequently, the heating effect on the battery is unstable.

[0056] In this application, heating elements 30 are not only provided on the surface of the battery 20 with a larger area along the second direction, but also on at least one surface of the battery 20 along the first and second directions. This allows for simultaneous heating of multiple surfaces of the battery 20 in different directions, resulting in a fast overall heating rate and high heating efficiency. Furthermore, the heating elements 30 are mounted on the frame 10, making them less susceptible to the effects of battery 20 expansion and deformation. This ensures more stable installation of the heating elements 30, preventing them from detaching from the battery 20 surface or breaking, thus providing a more stable heating effect on the battery 20.

[0057] According to the embodiment of the present utility model, the battery pack 100 has heating elements 30 provided on the sides of the battery 20 in different directions. One of the sides with heating elements 30 is the surface of the battery 20 with a larger area. This allows multiple sides of the battery 20 to be heated, which helps to improve the heating rate and heating uniformity of the battery 20, thereby improving the working performance of the battery pack 100 in low-temperature environments. In addition, the heating elements 30 are not easily damaged, and the heating effect on the battery 20 is relatively stable.

[0058] In some embodiments of this utility model, as shown in Figures 1-9, there are multiple heating elements 30, including a first heating element 31, a second heating element 32 and a third heating element 33. The first heating element 31 is located on one side of the battery 20 in the second direction, the second heating element 32 is located on one side of the battery 20 in the first direction, and the third heating element 33 is located on the other side of the battery 20 in the first direction.

[0059] By using the first heating element 31, the second heating element 32, and the third heating element 33, the surface of the battery 20 along one side of the second direction and both sides of the battery 20 along the first direction can be heated simultaneously, achieving simultaneous heating of all three sides of the battery 20, resulting in a faster heating rate and higher heating efficiency. Furthermore, the second heating element 32 and the third heating element 33 simultaneously heat the surface of the battery 20 along both sides of the first direction, making the temperature of each part of the battery 20 more uniform along the first direction, thus improving the heating uniformity of the battery 20.

[0060] In some embodiments, as shown in Figures 1-5, the first heating element 31, the second heating element 32, and the third heating element 33 are separate components, which can be installed separately on the frame 10, thereby reducing the difficulty of installation.

[0061] In some embodiments, as shown in Figures 1-5 and 10, the battery pack 100 further includes an electronic control unit 40. The first heating element 31, the second heating element 32, and the third heating element 33 are electrically connected to the electronic control unit 40, forming a parallel connection. The electronic control unit 40 can control the heating elements 30 to heat the battery 20. The electronic control unit 40 can individually control the heating temperature of each of the first heating element 31, the second heating element 32, and the third heating element 33 on the battery 20, facilitating adaptation to the heating temperature requirements of different parts of the battery 20. This improves the overall temperature consistency of the battery 20, reduces the risk of performance degradation due to uneven temperature rise in different parts of the battery 20, and ultimately improves the performance of the battery 20, such as increasing its energy storage capacity.

[0062] In some embodiments, as shown in Figures 1-5, the electronic control unit 40 is located on the third-direction side of the battery 20, and the first heating element 31, the second heating element 32, and the third heating element 33 each have a first solder pad 421 at one end in the third-direction direction. For example, as shown in Figure 1, the electronic control unit 40 is located on the front side of the battery 20, and the first heating element 31, the second heating element 32, and the third heating element 33 each have a first solder pad 421 at their front end.

[0063] The first pad 421 is electrically connected to the control unit 40 via a wiring harness 41, thereby connecting the control unit 40 to the corresponding heating element 30. This enables each of the first heating element 31, the second heating element 32, and the third heating element 33 to be individually electrically connected to the control unit 40. Specifically, the first pad 421 of the first heating element 31 is electrically connected to the control unit 40 via the wiring harness 41, the first pad 421 of the second heating element 32 is electrically connected to the control unit 40 via the wiring harness 41, and the first pad 421 of the third heating element 33 is electrically connected to the control unit 40 via the wiring harness 41.

[0064] The first heating element 31, the second heating element 32, and the third heating element 33 are each electrically connected to the electronic control unit 40 through the first solder pad 421 and the wiring harness, realizing the parallel connection of the first heating element 31, the second heating element 32, and the third heating element 33 in the circuit. This allows the electronic control unit 40 to individually control the first heating element 31, the second heating element 32, and the third heating element 33, thereby controlling the temperature of different positions of the battery 20 and making the heating of each part of the battery 20 more controllable.

[0065] For example, in some embodiments, as shown in FIG10, the electronic control unit 40 includes a battery monitoring manager (i.e., BMC mainboard, Battery Management Controller) 401, a vehicle low-voltage connector 402, a dual electronic control plug-in 403, a boost relay 404, a main positive relay 405, a pre-charge resistor 406, a pre-charge relay 407, a heating relay 408, a DC charging connector 409, a fast charging relay 410, a DC charging fuse 411, a dual electronic control fuse 412, a high voltage monitoring module (i.e., HVSU, High Voltage Safety Unit) 413, a main negative relay 414, and a heating fuse 415. The first heating element 31, the second heating element 32, and the third heating element 33 are connected in parallel in the circuit shown in FIG10 so that the heating temperature of the first heating element 31, the second heating element 32, and the third heating element 33 on the battery 20 can be individually controlled by the electronic control unit 40, which is beneficial to adapt to the different heating temperature requirements of different parts of the battery 20.

[0066] In some embodiments of this utility model, as shown in Figures 6-9 and 11, the first heating element 31 is electrically connected to the second heating element 32 and the third heating element 33, respectively. One of the first heating element 31, the second heating element 32, and the third heating element 33 is electrically connected to the electronic control unit 40, so that the first heating element 31, the second heating element 32, and the third heating element 33 are connected in series. This not only facilitates the separate installation of the first heating element 31, the second heating element 32, and the third heating element 33, but also allows the electronic control unit 40 to simultaneously control the first heating element 31, the second heating element 32, and the third heating element 33, making it convenient to simultaneously adjust the heating temperature of the first heating element 31, the second heating element 32, and the third heating element 33, and simplifying the circuit connection of the battery pack 100.

[0067] In some embodiments, as shown in Figures 6-7, the electronic control unit 40 is located on the third-party side of the battery 20, and the first heating element 31 has a first solder pad 421 at one end in the third-party direction. For example, as shown in Figures 6-7, the electronic control unit 40 is located on the front side of the battery 20, and the first heating element 31 has a first solder pad 421 at its front end.

[0068] The first pad 421 is electrically connected to the electrical control unit 40 via the wiring harness 41, which in turn connects the first heating element 31 to the electrical control unit 40. The first heating element 31 is electrically connected to the second heating element 32 and the third heating element 33, respectively. Therefore, the first heating element 31, the second heating element 32 and the third heating element 33 are all electrically connected to the electrical control unit 40.

[0069] The first heating element 31 and the electronic control unit 40 are electrically connected through the first solder pad 421 and the wiring harness 41, thereby realizing the electrical connection between the first heating element 31, the second heating element 32 and the third heating element 33 as a whole and the electronic control unit 40. This makes it convenient for the electronic control unit 40 to simultaneously control the heating temperature of the first heating element 31, the second heating element 32 and the third heating element 33 through a smaller number of first solder pads 421 and wiring harness 41, which helps to simplify the structure of the battery pack 100.

[0070] In some embodiments, as shown in Figures 6 and 8-9, the second heating element 32 and the third heating element 33 each have a second pad 422 at one end near the first heating element 31 in a second direction, and the first heating element 31 has a second pad 422 at both ends near the second heating element 32 and the third heating element 33 in a first direction. The second pads 422 of adjacent heating elements 30 are electrically connected through a wiring harness 41 to connect adjacent heating elements 30. For example, as shown in Figures 6 and 8-9, the first heating element 31 is located on the upper side of the battery 20, and the second heating element 32 and the third heating element 33 are located on the left and right sides of the battery 20, respectively. The upper end of the second heating element 32, the upper end of the third heating element 33, and both ends of the first heating element 31 have second pads 422. The second pads 422 of adjacent first heating elements 31 and second heating elements 32 are electrically connected through a wiring harness to achieve electrical connection between adjacent first heating elements 31 and second heating elements 32. The second pads 422 of adjacent first heating elements 31 and third heating elements 33 are electrically connected through wire harnesses to achieve electrical connection between adjacent first heating elements 31 and third heating elements 33.

[0071] Electrical connections between adjacent heating elements 30 are achieved through the second solder pad 422 and the wiring harness 41, so that the first heating element 31, the second heating element 32 and the third heating element 33 are connected in series. Then, the first heating element 31, the second heating element 32 and the third heating element 33 are electrically connected to the electronic control unit 40 through the first solder pad 421 and the wiring harness 41. This helps to reduce the installation difficulty of multiple heating elements 30 and facilitates the manufacturing of the battery pack 100.

[0072] For example, in some embodiments, as shown in FIG11, the first heating element 31, the second heating element 32 and the third heating element 33 are connected in series in the circuit so that the heating temperature of the battery 20 by the first heating element 31, the second heating element 32 and the third heating element 33 as a whole can be controlled by the electronic control unit 40, which helps to simplify the circuit.

[0073] Furthermore, different heating elements 30 can be electrically connected not only through the second solder pad 422 and the wiring harness 41, but also through a plug, or through other means. This application does not limit this.

[0074] In some embodiments of this utility model, the first heating element 31, the second heating element 32, and the third heating element 33 are integrated into one piece, which can install the first heating element 31, the second heating element 32, and the third heating element 33 onto the frame 10 at one time, resulting in higher installation efficiency.

[0075] In an embodiment where the first heating element 31, the second heating element 32, and the third heating element 33 are integrated, a solder pad 42 can be uniformly provided at any of the first heating element 31, the second heating element 32, and the third heating element 33. The electrical connection between the first heating element 31, the second heating element 32, and the third heating element 33 and the electrical control unit 40 can be achieved by connecting the wiring harness 41 through the solder pad 42.

[0076] In some embodiments of this utility model, as shown in Figures 1-9, the frame 10 includes a tray 11, multiple side beams 12, and a connector 13. The side beams 12 and the battery 20 are disposed on the tray 11. At least two side beams 12 are located on both sides of the battery 20 in a first direction. The connector 13 connects the two side beams 12 and is located on one side of the battery 20 in a second direction. The battery 20 is placed between the tray 11, the side beams 12, and the connector 13. The tray 11 supports the battery 20, and the side beams 12, the connector 13, and the tray 11 can limit the position of the battery 20. For example, in the event of expansion, the battery 20 is restricted to reduce its deformation, thereby reducing the risk of excessive expansion and deformation of the battery 20 that could compress other structures and improve the safety of the battery 20.

[0077] The heating element 30 is mounted on the connector 13 and the two side beams 12 to heat the battery 20 on one side in the second direction and on both sides in the first direction, that is, to heat the three surfaces of the battery 20. The heating rate of the battery 20 as a whole is fast and the heating uniformity is good. Furthermore, the connector 13 and the side beams 12 are not easy to move, making the installation of the heating element 30 more stable.

[0078] In some embodiments, the heating element 30 is bonded to the side beam 12 and the connector 13. Bonding is easy to implement, which not only reduces the installation difficulty of the heating element 30, but also increases the contact area between the heating element 30 and the frame 10, improves the sealing performance between the heating element 30 and the frame 10, and makes the heat of the heating element 30 less likely to be wasted but more transferred to the frame 10 and then to the battery 20, thereby accelerating the heating rate of the battery 20.

[0079] The heating element 30 can be located inside or outside the frame 10. For example, in some embodiments, as shown in Figures 1-9, the heating element 30 is located on the side of the frame 10 away from the battery 20, that is, the heating element 30 is located on the outside of the frame 10, which makes the installation of the heating element 30 more convenient.

[0080] In some embodiments, the connector 13 is a heat spreader, which allows the heat from the heating element 30 to be transferred to the battery 20, thereby improving the heating uniformity of the battery 20. Of course, in other embodiments, the connector 13 can also be a common pull plate or other components, as long as it can connect the two side beams 12 and limit the position of the battery 20.

[0081] In some embodiments of this invention, the battery cell 21 includes a body 211 and a terminal post 212, with the terminal post 212 located on one side of the body 211 in the third direction. Multiple heating elements 30 are included, including a fourth heating element, which is located on the other side of the body 211 in the third direction; that is, the terminal post 212 and the fourth heating element are located on opposite sides of the body 211 in the third direction. For example, in some specific embodiments, the terminal post 212 is located on the front side of the body 211, and the fourth heating element is located on the rear side of the body 211.

[0082] By heating one side of the battery 20 in a third direction using the fourth heating element, and combining the first heating element 31, the second heating element 32 and the third heating element 33, all four sides of the battery 20 can be heated simultaneously, resulting in a faster heating rate for the battery 20.

[0083] In embodiments that include a fourth heating element, at least two of the first heating element 31, the second heating element 32, the third heating element 33, and the fourth heating element may be separate components or integral components.

[0084] In some embodiments, the plurality of heating elements 30 further includes a fifth heating element, which is located on opposite sides of the battery 20. For example, in some specific embodiments, the fourth heating element is located on the rear side of the battery 20, and the fifth heating element is located on the front side of the battery 20. By heating the battery 20 on the third-direction sides by the fourth and fifth heating elements, and in combination with the first heating element 31, the second heating element 32, and the third heating element 33, all five sides of the battery 20 can be heated simultaneously, resulting in a faster heating rate for the battery 20.

[0085] In embodiments that include a fifth heating element, at least two of the first heating element 31, the second heating element 32, the third heating element 33, the fourth heating element, and the fifth heating element can be either separate components or a single integrated component.

[0086] In some embodiments of the frame 10, which includes a tray 11, multiple side beams 12, and a connector 13, there are four side beams 12. Two side beams 12 are located on either side of the battery 20 in a first direction, with the second heating element 32 and the third heating element 33 respectively mounted on these two side beams 12. The other two side beams 12 are located on either side of the battery 20 in a third direction, with the fourth heating element and the fifth heating element respectively mounted on these two side beams 12. The connector 13 connects these four side beams 12, and the first heating element 31 is mounted on the connector 13. Thus, five heating elements 30 are installed via four side beams 12 and one connector 13 to enclose the battery 20 within the heating range of the heating elements 30, resulting in a high heating rate and heating uniformity for the battery 20.

[0087] In some embodiments of this utility model, as shown in Figures 1-9, the heating element 30 is a heating film. The heating film can cover the surface of the battery 20 to heat most of the surface of the battery 20. Compared with heating only less than half of the surface of the battery 20, the heating film covering most or even all of the surface of the battery 20 results in a faster overall heating rate and better heating uniformity.

[0088] As shown in Figure 12, the electrical device 200 according to an embodiment of the present invention includes a battery pack 100 according to an embodiment of the present invention. The electrical device 200 can be a vehicle, ship, or aircraft, etc., and the battery pack 100 of the present invention can form the power system of the electrical device 200.

[0089] Since the battery pack 100 according to the present utility model embodiment has the above-mentioned beneficial technical effects, the electrical device 200 according to the present utility model embodiment, by providing heating elements 30 on the sides of the battery 20 in different directions, one of the sides provided with heating elements 30 is the surface of the battery 20 with a larger area, can heat multiple sides of the battery 20, which is beneficial to improve the heating rate and heating uniformity of the battery 20, thereby improving the working performance of the battery pack 100 in low-temperature environments, and thus improving the working performance of the electrical device 200 in low-temperature environments. Moreover, the heating elements 30 are not easily damaged, and the heating effect of the battery 20 is relatively stable.

[0090] Other configurations and operations of the battery pack 100 and the electrical device 200 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0091] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0092] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack (100), characterized in that, include: Frame (10); Battery (20), the battery (20) is disposed within the frame (10) and includes a plurality of battery cells (21), the plurality of battery cells (21) are arranged along a first direction, the projected area of ​​the battery (20) in a second direction is greater than the projected area of ​​the battery (20) in a third direction, the first direction, the second direction and the third direction are perpendicular to each other; Heating element (30), the heating element (30) is disposed on the frame (10), the heating element (30) is located on one side of the battery (20) in the second direction, and on at least one side of the battery (20) in the first direction and the third direction.

2. The battery pack (100) according to claim 1, characterized in that, The heating element (30) is multiple and includes a first heating element (31), a second heating element (32) and a third heating element (33). The first heating element (31) is located on one side of the battery (20) in the second direction, the second heating element (32) is located on one side of the battery (20) in the first direction, and the third heating element (33) is located on the other side of the battery (20) in the first direction.

3. The battery pack (100) according to claim 2, characterized in that, The first heating element (31), the second heating element (32) and the third heating element (33) are separate components.

4. The battery pack (100) according to claim 3, characterized in that, It also includes an electronic control unit (40), wherein the first heating element (31), the second heating element (32) and the third heating element (33) are electrically connected to the electronic control unit (40), and the electronic control unit (40) is adapted to control the heating element (30) to heat the battery (20).

5. The battery pack (100) according to claim 4, characterized in that, The electronic control unit (40) is located on the third-direction side of the battery (20). The first heating element (31), the second heating element (32) and the third heating element (33) are each provided with a first solder pad (421) at one end of the third-direction side. The first solder pad (421) is electrically connected to the electronic control unit (40) through a wire harness (41) so that the electronic control unit (40) is electrically connected to the corresponding heating element (30).

6. The battery pack (100) according to claim 3, characterized in that, It also includes an electronic control unit (40), wherein the first heating element (31) is electrically connected to the second heating element (32) and the third heating element (33) respectively, and one of the first heating element (31), the second heating element (32) and the third heating element (33) is electrically connected to the electronic control unit (40), and the electronic control unit (40) is adapted to control the heating element (30) to heat the battery (20).

7. The battery pack (100) according to claim 6, characterized in that, The electronic control unit (40) is located on the third-direction side of the battery (20). The first heating element (31) has a first solder pad (421) at one end in the third-direction direction. The first solder pad (421) is electrically connected to the electronic control unit (40) through a wire harness (41) so that the first heating element (31), the second heating element (32) and the third heating element (33) are all electrically connected to the electronic control unit (40).

8. The battery pack (100) according to claim 7, characterized in that, The second heating element (32) and the third heating element (33) are each located at one end of the first heating element (31) in the second direction. The first heating element (31) is provided with a second pad (422) at both ends of the first heating element (32) and the third heating element (33) in the first direction. The second pads (422) of adjacent heating elements (30) are electrically connected by a wire harness (41) to make adjacent heating elements (30) electrically connected.

9. The battery pack (100) according to claim 2, characterized in that, The first heating element (31), the second heating element (32) and the third heating element (33) are a single piece.

10. The battery pack (100) according to claim 1, characterized in that, The frame (10) includes a tray (11), a plurality of side beams (12) and a connector (13). The side beams (12) and the battery (20) are disposed on the tray (11). At least two of the side beams (12) are located on both sides of the battery (20) in a first direction. The connector (13) connects the two side beams (12) and is located on one side of the battery (20) in a second direction. The heating element (30) is disposed on the connector (13) and the two side beams (12).

11. The battery pack (100) according to claim 10, characterized in that, The heating element (30) is bonded to the side beam (12) and the connector (13).

12. The battery pack (100) according to claim 10, characterized in that, The heating element (30) is located on the side of the frame (10) opposite to the battery (20).

13. The battery pack (100) according to claim 1, characterized in that, The battery cell (21) includes a body (211) and a terminal post (212). The terminal post (212) is located on the side of the body (211) facing the third direction. The heating element (30) is multiple and includes a fourth heating element, which is located on the other side of the body (211) facing the third direction.

14. The battery pack (100) according to claim 13, characterized in that, The plurality of heating elements (30) also include a fifth heating element, which is located on opposite sides of the battery (20) along with the fourth heating element.

15. The battery pack (100) according to any one of claims 1-14, characterized in that, The heating element (30) is a heating film, which is adapted to cover the surface of the battery (20).

16. An electrical appliance (200), characterized in that, Includes the battery pack (100) according to any one of claims 1-15.

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