Battery and battery pack

Abstract

The application relates to the technical field of batteries, and discloses a battery and a battery pack, wherein the battery comprises a shell, an electric core arranged in the shell, a pole column assembly arranged on the shell, and a heat dissipation fin arranged on the shell. The heat dissipation fin can timely lead out the heat of the battery to avoid the accumulation of the heat in the battery, so that the safety performance of the battery is ensured.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery and a battery pack. Background Technology

[0002] The battery packs in the relevant technologies consist of multiple batteries. During the use of the battery packs, a large amount of heat will be generated. The relevant technologies only use liquid cooling plates for heat dissipation, which has weak heat dissipation capacity and may sometimes cause safety issues. Summary of the Invention

[0003] This invention provides a battery and a battery pack to improve battery performance.

[0004] According to a first aspect of the present invention, a battery is provided, comprising:

[0005] case;

[0006] The battery cell is housed inside the casing.

[0007] The pole assembly is mounted on the housing.

[0008] Heat sink, which is mounted on the housing.

[0009] The battery of this invention includes a casing, a battery cell, a terminal assembly, and a heat sink. The battery cell is sealed inside the casing, and the terminal assembly and the heat sink are both disposed on the casing. By providing a heat sink on the casing, the heat sink can dissipate the battery's heat in a timely manner, avoiding excessive heat accumulation inside the battery and thus ensuring the battery's safety performance.

[0010] According to a second aspect of the present invention, a battery pack is provided, comprising a plurality of batteries arranged along a first direction, the batteries comprising:

[0011] case;

[0012] The battery cell is housed inside the casing.

[0013] The pole assembly is mounted on the housing.

[0014] Heat sink, which is mounted on the housing.

[0015] The battery pack of this invention includes at least two batteries, which are stacked together, along with a casing, battery cells, terminal assembly, and heat sink. By providing a heat sink on the casing, the heat from the battery can be dissipated in a timely manner, preventing excessive heat accumulation inside the battery and thus ensuring the safety performance of the battery pack. Attached Figure Description

[0016] To better understand this disclosure, reference may be made to the embodiments shown in the following figures. Components in the figures are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of this disclosure. Additionally, related elements or components may have different arrangements as known in the art. Furthermore, in the figures, the same reference numerals denote the same or similar components in various figures. Wherein:

[0017] Figure 1 This is a partial structural schematic diagram of a battery pack according to an exemplary embodiment;

[0018] Figure 2 This is a partial structural schematic diagram of a battery pack according to an exemplary embodiment;

[0019] Figure 3 This is a partial cross-sectional structural diagram of a battery pack according to an exemplary embodiment;

[0020] Figure 4 This is a schematic diagram of a battery pack according to an exemplary embodiment;

[0021] Figure 5 This is a partial structural schematic diagram of a battery pack according to an exemplary embodiment;

[0022] Figure 6 This is a partial structural schematic diagram of a battery according to an exemplary embodiment;

[0023] Figure 7 This is a partially exploded structural diagram of a battery according to an exemplary embodiment;

[0024] Figure 8 This is a partially exploded structural diagram of a housing according to an exemplary embodiment;

[0025] Figure 9 This is a partial structural schematic diagram of a battery cell according to an exemplary embodiment;

[0026] Figure 10 This is a structural schematic diagram of a temperature regulating plate from one perspective, according to an exemplary embodiment.

[0027] Figure 11 This is a structural schematic diagram of a temperature regulating plate from another perspective, according to an exemplary embodiment;

[0028] Figure 12 This is an exploded structural diagram of a temperature control plate according to an exemplary embodiment, shown from one perspective.

[0029] Figure 13This is a partially exploded structural schematic diagram of a temperature control plate from another perspective, according to an exemplary embodiment.

[0030] Figure 14 This is a schematic structural diagram of a temperature regulating plate from one perspective, according to another exemplary embodiment;

[0031] Figure 15 This is a structural schematic diagram of a temperature regulating plate from another perspective, according to another exemplary embodiment;

[0032] Figure 16 This is a partially exploded structural diagram of a temperature regulating plate according to another exemplary embodiment.

[0033] The annotations in the attached figures are explained as follows:

[0034] 1. Battery; 10. Housing; 11. First surface; 12. Second surface; 13. First housing component; 14. Second housing component; 15. Receiving cavity; 20. Battery cell; 21. Battery cell body; 22. Terminal tab; 30. Heat sink; 40. Frame assembly; 41. First pre-tightening component; 42. Second pre-tightening component; 50. Circuit board; 51. Isolator; 60. Temperature regulating plate; 61. Receiving groove; 62. Gap; 63. Fluid circulation channel; 631. First flow channel; 632. Second flow channel; 633. Third flow channel; 64. First plate; 65. Second plate; 70. Terminal assembly. Detailed Implementation

[0035] The technical solutions in the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of this disclosure.

[0036] In the description of this disclosure, unless otherwise expressly specified and limited, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more; and the term “and / or” includes any and all combinations of one or more associated listed items. In particular, references to “the / described” object or “a” object are also intended to indicate one of a possible plurality of such objects.

[0037] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0038] Furthermore, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this disclosure are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this disclosure. It should also be understood that, in the context of a reference to an element or feature being connected to another element(s) "upper," "lower," "inner," or "outer," it can be directly connected to the other element(s) "upper," "lower," "inner," or "outer," or indirectly connected to the other element(s) "upper," "lower," "inner," or "outer" through an intermediate element.

[0039] One embodiment of the present invention provides a battery, please refer to... Figures 6 to 9 The battery includes: a housing 10; a battery cell 20 disposed inside the housing 10; a terminal assembly 70 disposed on the housing 10; and a heat sink 30 disposed on the housing 10.

[0040] A battery according to one embodiment of the present invention includes a casing 10, a battery cell 20, a terminal assembly 70, and a heat sink 30. The battery cell 20 is sealed inside the casing 10, and the terminal assembly 70 and the heat sink 30 are both disposed on the casing 10. By providing the heat sink 30 on the casing 10, the heat sink 30 can dissipate the heat of the battery in a timely manner, thereby avoiding excessive heat accumulation inside the battery and ensuring the safety performance of the battery.

[0041] In one embodiment, the heat sink 30 is arranged around the outer circumferential edge of the housing 10, that is, the heat sink 30 forms a circumferentially closed structure to ensure that the housing 10 dissipates heat in a timely manner.

[0042] Optionally, the heat sink 30 may be a circumferentially open structure. Further, the heat sink 30 may include a plurality of spaced sub-heat sinks.

[0043] In one embodiment, such as Figures 6 to 8 As shown, the housing 10 includes: a first housing component 13; a second housing component 14, the second housing component 14 being connected to the first housing component 13 to enclose the battery cell 20; wherein, at least one of the first housing component 13 and the second housing component 14 is provided with a heat sink 30 to ensure that the heat on the housing 10 can be dissipated in a timely manner through the heat sink 30.

[0044] Optionally, the heat sink 30 can be arranged around the first housing member 13 in the circumferential direction, and the heat sink 30 can be arranged around the second housing member 14 in the circumferential direction. The heat sink 30 can be a closed annular structure or an intermittent structure.

[0045] In one embodiment, such as Figure 8 As shown, a heat sink 30 is provided on the outer circumferential edge of the first housing component 13 and a heat sink 30 is provided on the outer circumferential edge of the second housing component 14. The heat sink 30 on the first housing component 13 and the heat sink 30 on the second housing component 14 are welded together, so that the first housing component 13 and the second housing component 14 are connected through the heat sink 30, thereby ensuring the reliability of the welding.

[0046] In one embodiment, the first housing 13 and the heat sink 30 thereon are integrally formed, which not only facilitates processing but also ensures the stability of the structure.

[0047] Correspondingly, the second housing 14 and the heat sink 30 thereon are integrally formed, which not only facilitates processing but also ensures the stability of the structure.

[0048] Optionally, the first housing component 13 and its heat sink 30 are integrally formed, and the second housing component 14 and its heat sink 30 are also integrally formed. This allows for welding of the heat sink 30 on the first housing component 13 to the heat sink 30 on the second housing component 14 during subsequent connection. The heat sink 30 not only increases the welding area, thus improving welding stability, but also serves as a heat dissipation device.

[0049] In some embodiments, it is possible that the first housing component 13 and the heat sink 30 thereon are two independently formed structures, which can be connected later by welding or other methods. Similarly, it is possible that the second housing component 14 and the heat sink 30 thereon are two independently formed structures, which can be connected later by welding or other methods.

[0050] In some embodiments, at least one of the first housing member 13 and the second housing member 14 forms a receiving cavity 15. After the first housing member 13 and the second housing member 14 are mated, the battery cell 20 is located in the receiving cavity 15, thereby ensuring a reliable seal of the battery cell 20.

[0051] Optionally, both the first housing member 13 and the second housing member 14 may be formed with a receiving cavity 15. The depth of the receiving cavity 15 of the first housing member 13 and the second housing member 14 may be the same or different, which is not limited here.

[0052] Optionally, the first housing component 13 is a flat plate, and the second housing component 14 forms a receiving cavity 15, in which the battery cell 20 is located. The flat plate design facilitates subsequent connection and reduces processing difficulty.

[0053] Optionally, the thickness of the first housing component 13 is uniform, which not only provides strong structural stability but also facilitates processing. The thickness of the second housing component 14 is also uniform. The thickness of the first housing component 13 can be equal to the thickness of the second housing component 14.

[0054] It should be noted that the heat sink 30 can be understood as a flange edge, for example, a flange edge extending outward from the circumferential outer edge of a flat plate, or a flange edge extending outward from the sidewall of a structure having a receiving cavity 15. In this case, the flange edge is approximately perpendicular to the sidewall. This arrangement can be referenced for the heat sink 30 provided on the circumferential edges of the first housing member 13 and the second housing member 14 mentioned in the above embodiments, so that the heat sink 30 of the first housing member 13 and the heat sink 30 of the second housing member 14 can directly face each other, thereby facilitating connection.

[0055] In one embodiment, the battery cell 20 includes a cell body 21 and tabs 22. The tabs 22 extend from the length of the cell body 21 and from the side of the cell body 21. The battery 1 also includes a terminal assembly 70, which is mounted on the housing 10 and connected to the tabs 22. The terminal assembly 70 may be disposed on the first housing member 13 or the second housing member 14.

[0056] In one embodiment, the length of the battery is a, 400mm≤a≤2500mm, the width of the battery is b, the height of the battery is c, 2b≤a≤50b, and / or, 0.5c≤b≤20c.

[0057] Furthermore, 50mm≤b≤200mm, 10mm≤c≤100mm.

[0058] Preferably, 4b≤a≤25b, and / or 2c≤b≤10c.

[0059] In the above embodiments, the battery has a large length-to-width ratio while ensuring sufficient energy density, and further, a large width-to-height ratio.

[0060] In one embodiment, the length of the battery is 'a' and the width of the battery is 'b', where 4b ≤ a ≤ 7b. That is, the ratio of the battery length to its width in this embodiment is relatively large, thereby increasing the energy density of the battery and facilitating the subsequent formation of a battery pack.

[0061] In one embodiment, the height of the battery is c, where 3c≤b≤7c. The ratio of the battery width to its height is relatively large, which facilitates its formation while ensuring sufficient energy density.

[0062] Optionally, the battery length can be 500mm-1500mm, the battery width can be 80mm-150mm, and the battery height can be 15mm-25mm.

[0063] It should be noted that the length of the battery is the dimension along its length, the width of the battery is the dimension along its width, and the height of the battery is the dimension along its height, i.e., the thickness of the battery.

[0064] An embodiment of the present invention also provides a battery pack including a plurality of batteries 1 arranged along a first direction. Each battery 1 includes: a housing 10; a battery cell 20 disposed within the housing 10; a terminal assembly 70 disposed on the housing 10; and a heat sink 30 disposed on the housing 10.

[0065] One embodiment of the present invention provides a battery pack comprising at least two batteries 1, which are stacked together, a housing 10, battery cells 20, terminal assembly 70, and a heat sink 30. By providing the heat sink 30 on the housing 10, the heat from the batteries 1 can be dissipated in a timely manner, preventing excessive heat accumulation inside the batteries 1 and thus ensuring the safety performance of the battery pack.

[0066] In one embodiment, the housing 10 includes two first surfaces 11 facing each other in a first direction and four second surfaces 12 arranged around the first surfaces 11. At least one of the second surfaces 12 is provided with a heat sink 30, which extends out of the second surface 12 to ensure that the heat sink 30 can dissipate heat in a timely manner.

[0067] Furthermore, the area of ​​the first surface 11 is larger than the area of ​​the second surface 12. The battery pack includes a plurality of batteries 1 arranged along a first direction. The housing 10 includes two first surfaces 11 facing each other in the first direction, that is, the two adjacent first surfaces 11 of two adjacent batteries 1 are stacked, and the large surfaces of two adjacent batteries 1 are directly facing each other, thereby forming a stack. The stacking can be vertical or horizontal. The two adjacent first surfaces 11 are stacked, that is, the two first surfaces 11 of two batteries 1 can be in direct contact or indirect contact, which is not limited here.

[0068] The housing 10 includes two opposing first surfaces 11 and four second surfaces 12 arranged around the first surfaces 11. That is, the housing 10 is an approximately rectangular structure. Ignoring manufacturing errors, the housing 10 can be a rectangular structure.

[0069] The heat sink 30 is disposed on the second surface 12. Structurally, this design ensures that the heat sink 30 does not affect the stacking of two adjacent batteries 1, and the heat sink 30 extends outward relative to the main body of the battery 1, thereby dissipating heat in a timely manner. The heat sink 30 can extend from the first surface 11, that is, the heat sink 30 is located at the edge of the second surface 12, but structurally it is also located on the second surface 12. Alternatively, the heat sink 30 can be located in the middle of the second surface 12. When the housing 10 has a rectangular structure, the heat sink 30 can be approximately perpendicular to the second surface 12.

[0070] Optionally, each of the second surfaces 12 may be provided with a heat sink 30. Of course, it is also possible that one or at least two of the four second surfaces 12 may not be provided with a heat sink 30.

[0071] It should be noted that the shell 10 has a length direction and a width direction, and both the length direction and the width direction are straight lines. The length direction can be the longer extension direction of the shell 10, and the width direction can be the shorter extension direction of the shell 10. The two opposing first surfaces 11 are the large surfaces of the shell 10, and the four second surfaces 12 are the small surfaces of the shell 10. The four second surfaces 12 include two pairs of small surfaces, namely, a first pair of small surfaces extending along the length direction of the shell 10, and a second pair of small surfaces extending along the width direction of the shell 10. The area of ​​the first pair of small surfaces is larger than the area of ​​the second pair of small surfaces, but both are smaller than the area of ​​the large surfaces.

[0072] Optionally, each housing 10 has a corresponding heat sink 30. In some embodiments, it is not excluded that a housing 10 has at least two heat sinks 30, that is, at least two heat sinks 30 can be arranged at intervals on the second surface 12 of the housing 10. The "at least two" here means that the distance between each heat sink 30 and the same first surface 11 is not equal. If the housing 10 is placed horizontally, the two heat sinks 30 form a structure that is distributed vertically.

[0073] In some embodiments, the housing 10 is a metal housing, and the heat sink 30 is also made of a metal material. Optionally, the housing 10 can be made of stainless steel or aluminum, which has good corrosion resistance and sufficient strength. The heat sink 30 can be made of stainless steel or aluminum.

[0074] In one embodiment, such as Figure 1 and Figure 2 As shown, the battery pack also includes a frame assembly 40, which forms a clamping space in which each battery 1 is located, thereby preventing the battery pack from scattering during subsequent battery assembly.

[0075] The frame assembly 40 is used to ensure that there is a certain pre-tightening force between the batteries 1 and the batteries 1. Considering that the batteries 1 need to be placed directly into the box, it would be difficult to put the batteries 1 in if they are not constrained before being put in. Therefore, the frame assembly 40 can be used to constrain the batteries 1.

[0076] In one embodiment, such as Figure 2 As shown, the frame assembly 40 includes: two first pretensioners 41, which are arranged opposite to each other, with each battery 1 clamped between the two first pretensioners 41; and a second pretensioner 42, which is connected to the two first pretensioners 41 to clamp the battery 1 in the clamping space, thereby ensuring that each battery 1 is subjected to a certain pretension force to prevent the battery from loosening.

[0077] It should be noted that each battery 1 is clamped between two first pre-tightening members 41, and the second pre-tightening member 42 is used to ensure that a certain compressive force is generated between the two first pre-tightening members 41, thereby ensuring that the distance between the two first pre-tightening members 41 is fixed and that each battery is subjected to a certain pre-tightening force. The second pre-tightening member 42 may not be in contact with the battery 1; its main function is to provide clamping force to the two first pre-tightening members 41. Of course, it is also possible that the second pre-tightening member 42 is in contact with the battery 1. The first pre-tightening members 41 may be in direct contact with the battery 1, and it is also possible that other components are provided between the first pre-tightening member 41 and the battery 1.

[0078] In one embodiment, the second pretensioners 42 are arranged in pairs, with the two pairs of second pretensioners 42 located on both sides of the battery 1, forming a clamping space with the two first pretensioners 41. This ensures that each battery 1 is located in a circumferentially closed clamping space, thereby ensuring that each battery 1 is located in a relatively fixed position and avoiding problems such as shaking and falling off.

[0079] In some embodiments, the second pretensioner 42 is a circumferentially closed structure to cover each battery 1 and the two first pretensioners 41. That is, the second pretensioner 42 is arranged around the first pretensioners 41 and the battery 1, so that each battery 1 and the two first pretensioners 41 can be tightly pressed into the circumferentially closed space formed by the second pretensioner 42, thereby ensuring reliable clamping of the battery 1.

[0080] Optionally, the two first pretensioners 41 and the second pretensioner 42 are integrated into one structure, which not only facilitates installation but also ensures sufficient stability.

[0081] The first pre-tightening member 41 and the second pre-tightening member 42 can be integrally formed cable ties. Alternatively, they can be multiple independently formed plate structures that are subsequently connected to form an integral structure, facilitating the subsequent assembly of the battery 1.

[0082] In some embodiments, the first pretensioner 41 is an end plate, which is directly opposite to a first surface 11 of a battery 1; the second pretensioner 42 is a cable tie, which is directly opposite to a second surface 12 of each battery 1. The two first pretensioners 41 respectively contact the large surfaces of the two outermost batteries 1, thereby providing a reliable pretensioning force. Since the heat sink 30 is not located on the first surface 11, it avoids problems such as contact with the end plate. The cable tie can be used to connect the two end plates without damaging the heat sink 30, thus ensuring the reliability of the connection.

[0083] Optionally, the first pretensioner 41 is an end plate, which can be directly opposite to a second surface 12 of each battery 1, while the second pretensioner 42 is a cable tie, which can be directly opposite to a first surface 11 of a battery 1. In this case, the cable tie needs to constrain the large surfaces of the two outermost batteries 1, and the heat sink 30 may not be provided on the second surface 12 corresponding to the end plate.

[0084] In some embodiments, the cable tie can be steel strip, but it is also possible that the cable tie can be nylon strip, plastic cable tie, or other cable ties commonly used in related technologies.

[0085] In some embodiments, it is not excluded that both the first pretensioner 41 and the second pretensioner 42 are plate bodies. For example, the first pretensioner 41 is an end plate, and the second pretensioner 42 is a side plate.

[0086] In one embodiment, such as Figure 2 , Figure 4 as well as Figure 5 As shown, the battery pack also includes: a circuit board 50, which is disposed on one side of the battery 1; an isolator 51, which is located on the side of the circuit board 50 away from the battery 1, and a second pre-tightening member 42 is pressed onto the isolator 51. The circuit board 50 is used for signal acquisition, and can acquire the temperature and voltage of the battery 1, etc. The second pre-tightening member 42 can also be used to fix the isolator 51, and the isolator 51 provides electrical insulation between the circuit board 50 and external components.

[0087] Optionally, the circuit board 50 is fixed to the side of the battery 1, that is, at the location of the second surface 12, and specifically at the location of the smaller second surface 12.

[0088] It should be noted that the circuit board 50 can achieve stable monitoring of the battery 1 by connecting to the temperature detection unit, and the circuit board 50 can be electrically connected to the battery 1 to achieve voltage acquisition of the battery 1. The specific function of the circuit board 50 is not limited and can be determined according to actual needs. This embodiment focuses on demonstrating that the isolation member 51 used to isolate the circuit board 50 can be fixed by the second pre-tightening member 42.

[0089] Optionally, the circuit board 50 can be a flexible printed circuit board, i.e., an FPC (Flexible Printed Circuit), and the insulating member 51 can be made of insulating materials, such as plastic, rubber, etc.

[0090] like Figure 6 and Figure 7 as well as Figure 9 As shown, the battery cell 20 includes a cell body 21 and tabs 22. Tabs 22 extend from the length of the cell body 21 and from the side of the cell body 21. The battery 1 also includes a terminal assembly 70, which is mounted on the housing 10 and connected to the tabs 22. The circuit board 50 can be electrically connected to the tabs 22 via the terminal assembly 70. The tabs 22 and the terminal assembly 70 can be directly connected, i.e., directly soldered, or connected via a metal adapter. The specific connection method can be soldering, riveting, etc., and is not limited here.

[0091] In some embodiments, the pole assembly 70 is disposed on the first surface 11. In some embodiments, it is also possible that the pole assembly 70 is disposed on the second surface 12.

[0092] It should be noted that the cell body 21 includes two or more electrode plates, and the tab 22 includes two or more individual tabs. Each individual tab extends from its corresponding electrode plate, and the width of the individual tab is smaller than the width of the electrode plate. Multiple individual tabs are stacked to form the tab 22, which is connected to the terminal assembly 70. The tab 22 can be soldered to the terminal assembly 70. The individual tabs are made of metal foil with good electrical and thermal conductivity, such as aluminum, copper, or nickel.

[0093] In some embodiments, there are two terminal post assemblies 70, one a positive terminal post assembly and the other a negative terminal post assembly. There are also two tabs 22, one a positive tab and the other a negative tab. The positive terminal post assembly and the positive tab are connected, and the negative terminal post assembly and the negative tab are connected. At this time, there are also two circuit boards 50, located on opposite sides of the battery 1, thereby enabling signal acquisition from both sides. The second pre-tightening member 42 needs to fix the corresponding isolation members 51 of the two circuit boards 50; that is, the second pre-tightening member 42 can be a circumferentially closed structure, or the second pre-tightening member 42 can be a pair.

[0094] It should be noted that the pole assembly 70 and the housing 10 are insulated from each other. For example, they can be insulated with an insulating component or with an insulating coating. No limitation is made here.

[0095] In one embodiment, such as Figure 2 and Figure 3 As shown, the battery pack also includes a temperature regulating plate 60, and the outside of the temperature regulating plate 60 is provided with a receiving groove 61. The receiving groove 61 accommodates the heat sink 30 of each battery 1, thereby reducing the distance between the housing 10 and the temperature regulating plate 60, thereby improving the energy density of the battery.

[0096] There are at least two receiving slots 61, and at least two receiving slots 61 correspond to at least two batteries 1. Optionally, there may be only one receiving slot 61, and one receiving slot 61 may correspond to at least two batteries 1.

[0097] It should be noted that the temperature regulating plate 60 can be located at the top of each battery 1, that is, the temperature regulating plate 60 is positioned opposite to the second surface 12 of the battery 1, so that the heat sink 30 on the second surface 12 is directly opposite to the temperature regulating plate 60. Therefore, a receiving groove 61 can be provided on the temperature regulating plate 60 to ensure that the heat sink 30 extends into the receiving groove 61, thereby ensuring that the gap between the housing 10 and the temperature regulating plate 60 is not too large. Although heat sinks 30 can be provided on multiple second surfaces 12, only the heat sinks 30 directly opposite the temperature regulating plate 60 need to be positioned to avoid overlap. In some embodiments, it is also possible that the temperature regulating plate 60 is located at the bottom of each battery 1.

[0098] In one embodiment, such as Figure 3 As shown, there is a gap 62 between the heat sink 30 and the wall of the receiving groove 61, and the gap 62 is filled with thermally conductive adhesive to ensure reliable heat conduction between the heat sink 30 and the housing 10.

[0099] Furthermore, thermally conductive adhesive is also used to fill the space between the housing 10 and the temperature regulating plate 60, thereby ensuring reliable heat conduction between them. Since the heat sink 30 extends into the receiving groove 61, less thermally conductive adhesive is needed to fill the space between the housing 10 and the heat sink 30 and the temperature regulating plate 60, thus improving the energy density of the battery pack. The thermally conductive adhesive can be ultra-high temperature thermally conductive adhesive, silicone thermally conductive adhesive, epoxy resin AB adhesive, polyurethane adhesive, polyurethane thermally conductive adhesive, thermally conductive silicone grease, etc. The thermally conductive adhesive is an insulating adhesive.

[0100] It should be noted that a safe distance must be maintained between the heat sink 30 and the temperature regulating plate 60; therefore, a clearance fit is required between the heat sink 30 and the temperature regulating plate 60. Of course, in some embodiments, it is possible to coat the heat sink 30 and / or the temperature regulating plate 60 with an insulating material, thereby allowing the heat sink 30 to contact the temperature regulating plate 60. This insulating material must ensure sufficient thermal conductivity.

[0101] The temperature control plate 60 can be a liquid-cooled plate, an air-cooled plate, or other temperature control device with cooling or heating functions.

[0102] In one embodiment, a fluid circulation channel 63 is formed inside the temperature regulating plate 60. The fluid circulation channel 63 connects the fluid supply section and the fluid receiving section, thereby allowing the fluid to circulate within the temperature regulating plate 60, thus heating or cooling the temperature regulating plate 60. The fluid supply section supplies fluid to the fluid circulation channel 63, and the fluid receiving section recovers the fluid. The fluid can be a liquid or a gas. Optionally, the fluid circulation channel 63 can contain non-circulating fluid, i.e., the fluid circulation channel 63 can be a sealed space.

[0103] In one embodiment, such as Figure 13 and Figure 16 As shown, the fluid circulation channel 63 includes: a first flow channel 631, of which there are at least two, and a receiving groove 61 between two adjacent first flow channels 631; wherein, the extending direction of the first flow channel 631 is parallel to the extending direction of the heat sink 30 located in the receiving groove 61. Since the receiving groove 61 is formed between two first flow channels 631, the heat sink 30 located in the receiving groove 61 can be brought as close as possible to the first flow channel 631, thus enabling faster cooling or heating of the heat sink 30.

[0104] It should be noted that there is a receiving groove 61 between two adjacent first flow channels 631. The emphasis is only on the positional relationship of the three in the structural form. In fact, the first flow channel 631 is the internal structure of the temperature regulating plate 60, while the receiving groove 61 is the external structure of the temperature regulating plate 60. The emphasis here is on making the receiving groove 61 as close as possible to the first flow channel 631. For example, two spaced grooves can be stamped out from the inside of a flat plate. In this case, two spaced protrusions will be formed on the outside of the flat plate. The two grooves can be regarded as the first flow channels 631, and the space formed between the two protrusions is the receiving groove 61. Therefore, the receiving groove 61 can be made as close as possible to the first flow channel 631. At this time, at least part of the receiving groove 61 and the first flow channel 631 are located in the same horizontal space. Of course, the receiving groove 61 can also be located below the first flow channel 631, that is, the receiving groove 61 and the first flow channel 631 are not located in the same horizontal space, but are distributed vertically. However, in this case, the projections of the two first flow channels 631 and the receiving groove 61 on the horizontal plane make the projection of the receiving groove 61 sandwiched between the projections of the two first flow channels 631. Therefore, it can also be understood that there is a receiving groove 61 between two adjacent first flow channels 631.

[0105] In one embodiment, the number of receiving slots 61 is greater than the number of batteries 1, thereby increasing the number of first flow channels 631 and ensuring that the temperature regulating plate 60 can achieve rapid temperature regulation. Optionally, the number of first flow channels 631 corresponding to each battery 1 can be greater than or equal to three. Therefore, each battery 1 can correspond to at least two receiving slots 61. In this case, the heat sink 30 of the battery 1 can be selectively accommodated in one receiving slot 61. Of course, in some embodiments, the battery 1 can also correspond to at least two spaced heat sinks 30. In this case, the heat sinks 30 can be arranged one-to-one with the receiving slots 61.

[0106] In one embodiment, such as Figure 13 and Figure 16 As shown, the fluid circulation channel 63 further includes: a second flow channel 632, which connects to the fluid supply unit and is also connected to each of the first flow channels 631, so that the fluid supply unit can supply fluid to each of the first flow channels 631 through the second flow channel 632; and a third flow channel 633, which connects to the fluid receiving unit and is also connected to each of the first flow channels 631, so that the fluid in the first flow channels 631 can flow into the fluid receiving unit through the third flow channel 633. The fluid enters the temperature regulating plate 60 through the second flow channel 632 and is distributed to each of the first flow channels 631. The fluid in each of the first flow channels 631 converges through the third flow channel 633, thereby achieving circulating cooling or heating of the fluid within the temperature regulating plate 60. The first flow channels 631 can be grouped, i.e., multiple first flow channels 631 form a group, and each group is connected to the second flow channel 632 through an opening. Alternatively, each of the first flow channels 631 can be directly connected to the second flow channel 632, which is not limited here.

[0107] In one embodiment, the second flow channel 632 is connected to a set of first flow channels 631 on both sides, allowing the second flow channel 632 to flow into different first flow channels 631, thereby forming rapid flow. In this embodiment, the second flow channel 632 is located at the middle position of the temperature regulating plate 60. The term "set of first flow channels 631" indicates that one side of the temperature regulating plate 60 has multiple first flow channels 631, and the number of first flow channels 631 is not limited.

[0108] Furthermore, the third flow channel 633 is arranged around the first flow channel 631 and the second flow channel 632, so that the fluid in each of the first flow channels 631 can flow into the third flow channel 633 in a timely manner for discharge. In this embodiment, the third flow channel 633 is located near the outer circumferential edge of the temperature regulating plate 60.

[0109] Optionally, the second flow channel 632 may be located near the outer circumferential edge of the temperature regulating plate 60, while the third flow channel 633 may be located in the middle of the temperature regulating plate 60. That is, the two sides of the third flow channel 633 are respectively connected to a set of first flow channels 631, and the second flow channel 632 is arranged around the first flow channel 631 and the third flow channel 633.

[0110] In one embodiment, such as Figure 13 and Figure 16 As shown, the second flow channel 632 is located in the middle of the temperature regulating plate 60, and there are multiple first flow channels 631 on both sides of the second flow channel 632. At least two first flow channels 631 form a flow channel group, and each flow channel group is connected to the second flow channel 632 through an opening. The third flow channel 633 is arranged around the first flow channel 631 and the second flow channel 632, so that the fluid in each first flow channel 631 can flow through the first flow channel 631 completely and then flow into the third flow channel 633.

[0111] In one embodiment, at least one of the bottom ends of the second flow channel 632 and the third flow channel 633 is located in the same plane as the bottom end of the first flow channel 631. That is, the distances between the bottom ends of the first flow channel 631, the second flow channel 632 and the third flow channel 633 and the same horizontal plane on the housing 10 are equal. This arrangement ensures that the fluid can flow normally between the first flow channel 631, the second flow channel 632 and the third flow channel 633, while also having high structural reliability and being easy to process.

[0112] In one embodiment, at least one of the bottom ends of the second flow channel 632 and the third flow channel 633 is located above the bottom end of the first flow channel 631, thereby facilitating fluid flow and effectively reducing pressure loss.

[0113] In one embodiment, such as Figures 10 to 16 As shown, the temperature regulating plate 60 includes: a first plate body 64, which is provided with a receiving groove 61; and a second plate body 65, which is connected to the first plate body 64 to form a fluid circulation channel 63 between the second plate body 65 and the first plate body 64. The first plate body 64 and the second plate body 65 are independently arranged, which facilitates the formation of the internal fluid circulation channel 63.

[0114] Optionally, the first plate 64 and the second plate 65 are detachably disposed. Alternatively, the first plate 64 and the second plate 65 are not detachable.

[0115] In one embodiment, the entire first flow channel 631 is formed inside the first plate 64, and the entire second flow channel 632 and third flow channel 633 are formed inside the second plate 65. That is, the second flow channel 632 and the third flow channel 633 are designed in layers with the first flow channel 631. In this case, the second flow channel 632 and the third flow channel 633 need to be partially directly opposite the first flow channel 631 to ensure the normal flow of fluid.

[0116] Optionally, the interior of the first plate 64 is formed with the entire first flow channel 631 and portions of the second flow channel 632 and the third flow channel 633, and the interior of the second plate 65 is formed with portions of the second flow channel 632 and the third flow channel 633, so that the second flow channel 632 and the third flow channel 633 are both separated from the first flow channel 631, so that the temperature regulating plate 60 has two layers of flow channels, which can effectively reduce pressure loss.

[0117] Optionally, the interior of the first plate 64 forms the entire first flow channel 631, the second flow channel 632, and the third flow channel 633, meaning that the second plate 65 only provides sealing protection for the fluid circulation channel 63. The structure is relatively simple and the processing difficulty is low.

[0118] Optionally, the interior of the first plate 64 is formed with a first flow channel 631, a second flow channel 632, and a third flow channel 633, and the interior of the second plate 65 is formed with a first flow channel 631, a second flow channel 632, and a third flow channel 633, thereby ensuring that the interior of the temperature regulating plate 60 has sufficient fluid flow space to provide temperature regulation capability.

[0119] It should be noted that, as Figures 10 to 13 As shown, in this embodiment, the external and internal structures of the first plate 64 and the second plate 65 of the temperature regulating plate 60 are different. The second plate 65 may only have a second flow channel 632 and a third flow channel 633, while the first plate 64 has a first flow channel 631, a second flow channel 632, and a third flow channel 633 formed inside, as detailed below. Figure 12 and Figure 13 As shown.

[0120] like Figures 14 to 16 As shown, the external and internal structures of the first plate 64 and the second plate 65 of the temperature regulating plate 60 in this embodiment can be basically the same. The first plate 64 and the second plate 65 can each be provided with a first flow channel 631, a second flow channel 632 and a third flow channel 633.

[0121] In one embodiment, the battery is a stacked battery, which is not only convenient to assemble, but also allows for the processing of batteries with longer lengths.

[0122] Specifically, the cell 20 is a stacked cell, which has a first electrode layered on top of each other, a second electrode layer with the opposite electrical charge to the first electrode layer, and a separator layer disposed between the first electrode layer and the second electrode layer, so that multiple pairs of first electrode layers and second electrode layers are stacked to form a stacked cell.

[0123] Optionally, the battery can be a wound battery, which involves winding a first electrode, a second electrode with the opposite electrical charge to the first electrode, and a separator disposed between the first and second electrodes to obtain a wound battery cell.

[0124] It should be noted that the battery pack in the above embodiments can be a battery module or a battery pack. At least two battery packs can share a single temperature regulating plate 60; however, it is also possible that each battery pack has its own temperature regulating plate 60.

[0125] It should be noted that the structure of other components of battery 1 in the battery pack can refer to the structure of the battery described above, and will not be repeated here.

[0126] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and exemplary embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0127] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of this disclosure is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, Includes a plurality of batteries (1) arranged along a first direction, said battery (1) comprising: Shell (10); A battery cell (20) is disposed within the housing (10); A pole assembly (70) is disposed on the housing (10); Heat sink (30) is disposed on the housing (10); The housing (10) includes: First housing component (13); The second housing component (14) is connected to the first housing component (13) to enclose the battery cell (20). At least one of the first housing member (13) and the second housing member (14) is provided with the heat sink (30) and the pole post assembly (70). The first housing member (13) is integrally formed with the heat sink (30) thereon; the second housing member (14) is integrally formed with the heat sink (30) thereon. The heat sink (30) is provided on the outer circumferential edge of the first housing member (13) and the heat sink (30) is provided on the outer circumferential edge of the second housing member (14). The heat sink (30) on the first housing member (13) and the heat sink (30) on the second housing member (14) are welded together. The battery pack further includes a temperature regulating plate (60) and a frame assembly (40). The temperature regulating plate (60) is provided with a receiving groove (61) for accommodating the heat sinks (30) of each battery (1). There is a gap (62) between the heat sink (30) and the wall of the receiving groove (61). The heat sink (30) and the temperature regulating plate (60) are in clearance fit. The gap (62) is filled with thermally conductive adhesive. The thermally conductive adhesive is also filled between the housing (10) and the temperature regulating plate (60). The thermally conductive adhesive is an insulating adhesive. The frame assembly (40) forms a clamping space, and each battery (1) is located in the clamping space. The frame assembly (40) includes a first pre-tightening member (41) and a second pre-tightening member (42). There are two first pre-tightening members (41), which are arranged opposite to each other. Each battery (1) is clamped between the two first pre-tightening members (41). The second pre-tightening member (42) is connected to the two first pre-tightening members (41) to clamp the battery (1) in the clamping space. The two first pre-tightening members (41) and the second pre-tightening member (42) are an integral structure.

2. The battery pack according to claim 1, characterized in that, The housing (10) includes two first surfaces (11) opposite each other in the first direction and four second surfaces (12) arranged around the first surfaces (11), and a heat sink (30) is provided on at least one of the second surfaces (12), the heat sink (30) extending out from the second surface (12).

3. The battery pack according to claim 2, characterized in that, The area of ​​the first surface (11) is greater than the area of ​​the second surface (12).

4. The battery pack according to claim 2 or 3, characterized in that, The second pretensioners (42) are arranged in pairs, with the two pairs of second pretensioners (42) located on both sides of the battery (1) to form the clamping space with the two first pretensioners (41).

5. The battery pack according to claim 2 or 3, characterized in that, The second pretensioner (42) is a circumferentially closed structure to cover each of the batteries (1) and the two first pretensioners (41).

6. The battery pack according to claim 2 or 3, characterized in that, The first pretensioner (41) is an end plate, which is opposite to one of the first surfaces (11) of the battery (1); The second pretensioner (42) is a cable tie, which is opposite to one of the second surfaces (12) of each of the batteries (1).

7. The battery pack according to claim 4, characterized in that, The battery pack also includes: Circuit board (50), said circuit board (50) is disposed on one side of said battery (1); The isolator (51) is located on the side of the circuit board (50) away from the battery (1), and the second preload (42) is pressed onto the isolator (51).

8. The battery pack according to claim 5, characterized in that, The battery pack also includes: Circuit board (50), said circuit board (50) is disposed on one side of said battery (1); The isolator (51) is located on the side of the circuit board (50) away from the battery (1), and the second pre-tightening member (42) is pressed onto the isolator (51).

9. The battery pack according to claim 6, characterized in that, The battery pack also includes: Circuit board (50), said circuit board (50) is disposed on one side of said battery (1); The isolator (51) is located on the side of the circuit board (50) away from the battery (1), and the second preload (42) is pressed onto the isolator (51).

10. The battery pack according to any one of claims 1 to 3, characterized in that, The temperature regulating plate (60) has a fluid circulation channel (63).

11. The battery pack according to claim 10, characterized in that, The fluid circulation channel (63) includes: The first flow channel (631) is at least two, and there is a receiving groove (61) between two adjacent first flow channels (631). The first flow channel (631) extends in a direction parallel to the extension direction of the heat sink (30) located in the receiving groove (61).

12. The battery pack according to claim 11, characterized in that, The fluid circulation channel (63) further includes: The second flow channel (632) communicates with the fluid supply unit and is connected to each of the first flow channels (631) so that the fluid supply unit feeds fluid into each of the first flow channels (631) through the second flow channel (632); The third flow channel (633) is connected to the fluid receiving unit and is connected to each of the first flow channels (631) so that the fluid in the first flow channel (631) flows into the fluid receiving unit through the third flow channel (633).

13. The battery pack according to claim 12, characterized in that, The second flow channel (632) is connected to a set of the first flow channels (631) on both sides. The third flow channel (633) is arranged around the first flow channel (631) and the second flow channel (632).

14. The battery pack according to claim 12, characterized in that, At least one of the bottom ends of the second flow channel (632) and the third flow channel (633) lies in the same plane as the bottom end of the first flow channel (631); or, At least one of the bottom end of the second flow channel (632) and the bottom end of the third flow channel (633) is located above the bottom end of the first flow channel (631).

15. The battery pack according to claim 12, characterized in that, The temperature regulating plate (60) includes: The first plate (64) is provided with the receiving groove (61). The second plate (65) is connected to the first plate (64) to form the fluid circulation channel (63) between the second plate (65) and the first plate (64).

16. The battery pack according to claim 15, characterized in that, The entire first flow channel (631) is formed inside the first plate (64), and the entire second flow channel (632) and the third flow channel (633) are formed inside the second plate (65); Alternatively, the interior of the first plate (64) may contain the entire first flow channel (631) and portions of the second flow channel (632) and the third flow channel (633), and the interior of the second plate (65) may contain portions of the second flow channel (632) and the third flow channel (633). Alternatively, the interior of the first plate (64) may contain the entirety of the first flow channel (631), the second flow channel (632), and the third flow channel (633); Alternatively, the first plate (64) may have a portion of the first flow channel (631), the second flow channel (632), and the third flow channel (633) formed inside it, and the second plate (65) may have a portion of the first flow channel (631), the second flow channel (632), and the third flow channel (633) formed inside it.

17. The battery pack according to claim 1, characterized in that, The heat sink (30) is arranged around the outer circumferential edge of the housing (10).

18. The battery pack according to claim 1, characterized in that, The battery has a length of a, a width of b, and a height of c, where 2b ≤ a ≤ 50b, and / or 0.5c ≤ b ≤ 20c; 400mm≤a≤2500mm.

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