Battery pack

Abstract

The utility model discloses a battery pack, relates to battery technical field, including battery and heat conduction subassembly, battery is provided with heat conduction passageway, heat conduction subassembly includes liquid cooling box and a plurality of groups of heat conduction unit, the plurality of groups of heat conduction unit are arranged in liquid cooling box at interval, heat conduction unit includes cooling passageway, liquid outlet and liquid inlet that communicate with each other, the liquid outlet and the liquid inlet are both located between the inlet and the outlet of the cooling flow channel, the liquid cooling box body is connected with the battery, and the liquid outlet and the liquid inlet are communicated with the inlet and the outlet of the heat conduction flow channel respectively. And each heat conduction unit can independently conduct heat on the corresponding battery, so that partition management is facilitated. Each heat conduction unit comprises a cooling flow channel, a liquid outlet and a liquid inlet which are communicated with each other, and the liquid outlet and the liquid inlet are respectively communicated with the heat conduction flow channel of the battery, so that the cooling liquid can enter the heat conduction flow channel in the battery from the liquid outlet, heat exchange is directly carried out on the interior of the battery, and the heat dissipation efficiency of the battery is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] The battery pack is the main power source of electric vehicles. It is generally composed of multiple battery cells. The battery pack is installed between the battery cover and the bottom plate to form a battery pack. The battery pack is installed in the chassis of the electric vehicle to provide power. Since the power battery must have better performance and service life within a certain temperature range, the battery pack.

[0003] The prior art with announcement number CN220652134U discloses a cooling plate, a battery module and a battery pack, including a cold plate body, wherein a flow channel structure for the circulation of a cooling medium is provided in the cold plate body; a heat-conducting structural layer is provided on the top end surface of the cold plate body; and a heat-insulating structural layer is provided on the bottom end surface of the cold plate body. The flow channel structure is provided to facilitate the input and circulation of the cooling medium; the heat-conducting structural layer is provided to facilitate improving the thermal interaction ability between the cooling plate and the thermal management object; and the heat-insulating structural layer is provided to play a role of heat preservation at the bottom of the cooling plate, so as to effectively reduce the thermal interaction between the cooling plate and the external environment, avoid the temperature of the cooling medium inside the cooling plate from being affected by the external environment, and reduce energy loss.

[0004] However, this existing battery pack also has drawbacks. For example, the flow channel plate of this battery pack has only one set of coolant inlet and outlet pipes. The coolant entering through the inlet pipe must pass through all flow channel areas, making it impossible to manage these flow channel areas separately. In addition, the coolant in the flow channel area cannot flow into the battery cells and can only dissipate heat through heat conduction on the cell surface, resulting in low heat dissipation efficiency. Utility Model Content

[0005] The present utility model aims to overcome the above-mentioned technical deficiencies by proposing a battery pack that solves the technical problem that, in the prior art, the flow channel plate of a battery pack has only one set of coolant inlet and outlet pipes. Coolant entering through the inlet pipe must pass through all flow channel areas, making it impossible to manage these flow channel areas separately. Furthermore, coolant in the flow channel areas cannot flow into the battery cells, and can only dissipate heat through heat conduction on the cell surface, resulting in low heat dissipation efficiency.

[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a battery pack, comprising:

[0008] A battery having a heat conduction channel; and

[0009] A heat conduction component includes a liquid cooling box and multiple groups of heat conduction units, wherein the multiple groups of heat conduction units are arranged at intervals in the liquid cooling box, and the heat conduction units include a connected cooling channel, a liquid outlet and a liquid inlet, wherein the liquid outlet and the liquid inlet are both located between the inlet and the outlet of the cooling channel, the liquid cooling box is connected to the battery, and the liquid outlet and the liquid inlet are respectively connected to the inlet and the outlet of the heat conduction channel.

[0010] In some embodiments, the heat conductive component further includes a partition provided in the cooling channel, the partition dividing the cooling channel into a first cavity and a second cavity, the first cavity connecting the liquid outlet and the inlet of the cooling channel, and the second cavity connecting the liquid inlet and the outlet of the cooling channel.

[0011] In some embodiments, the number of the liquid inlet and the liquid outlet are both multiple, the multiple liquid inlets are evenly spaced along the length direction of the first cavity, and the multiple liquid outlets are evenly spaced along the length direction of the second cavity, and adjacent liquid inlets and liquid outlets can be connected to the corresponding heat conduction channels of the battery.

[0012] In some embodiments, the heat conduction channel is in a continuously curved shape.

[0013] In some embodiments, the heat conduction unit further includes a first connecting tube and a second connecting tube provided in the liquid cooling box and spaced apart, one end of the first connecting tube and one end of the second connecting tube being connected to the first cavity and the second cavity respectively, and the other end of the first connecting tube and the other end of the second connecting tube being detachably plugged into the inlet and outlet of the heat conduction channel respectively.

[0014] In some embodiments, the battery pack further includes an upper cover, which is connected to the liquid cooling box and forms a receiving cavity with the liquid cooling box, and the battery is located in the receiving cavity.

[0015] In some embodiments, the inner wall of the upper cover is provided with a plurality of convex strips arranged at intervals along its circumference, and the plurality of convex strips are all connected to the outer wall of the battery.

[0016] In some embodiments, the number of the batteries is multiple and they are interconnected. The multiple batteries are all connected to the liquid cooling box and are arranged along the coolant flow direction of the cooling channel. The inlet of the heat conduction channel of each battery is connected to the first cavity, and the outlet of the heat conduction channel of each battery is connected to the second cavity.

[0017] In some embodiments, the battery pack further includes a binding ring, a first end plate and a second end plate, wherein the first end plate and the second end plate are located at both ends of the plurality of batteries, and the binding ring is sleeved on the first end plate and the second end plate to clamp and fix the plurality of batteries.

[0018] In some embodiments, the battery pack further includes a temperature sensor, which is disposed in the liquid cooling box and in contact with the battery, and is used to provide feedback on the temperature of the battery.

[0019] Compared with the prior art, the heat conduction assembly of the battery pack provided by the present invention includes multiple heat conduction units, each of which can independently conduct heat to the corresponding battery, which is conducive to zoning management. Each heat conduction unit includes a connected cooling channel, a liquid outlet, and a liquid inlet. The inlet of the cooling channel is used to allow coolant to enter, and the outlet is used for coolant to flow out. The liquid outlet and the liquid inlet are respectively connected to the heat conduction channel of the battery, so that the coolant can enter the heat conduction channel inside the battery from the liquid outlet. After the coolant conducts heat to the inside of the battery, it is discharged into the cooling channel from the liquid inlet, thereby directly exchanging heat inside the battery. Compared with the prior art of heat exchange on the battery surface, the present application has a higher heat dissipation efficiency for the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a battery pack provided by an embodiment of the present utility model;

[0021] Figure 2 This is a disassembly diagram of a battery pack provided by an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the liquid cooling box provided by an embodiment of the present utility model;

[0023] Figure 4 It is a schematic diagram of the internal structure of a battery provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] To address the technical issues in the prior art where the flow channel plate of a battery pack has only one set of coolant inlet and outlet pipes, and the coolant entering through the inlet pipe must pass through all flow channel areas, making it impossible to manage the flow channel areas in a zoned manner. Furthermore, the coolant in the flow channel area cannot flow into the interior of the battery cells, and can only dissipate heat through the surface of the battery cells, resulting in low heat dissipation efficiency. The present invention provides a battery pack that can achieve zoned management of the battery's heat conduction; in addition, the coolant can flow directly through the interior of the battery cells, exchanging heat within the battery cells and achieving high heat dissipation efficiency.

[0026] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a battery pack 100 in one embodiment of the present invention. The battery pack 100 includes a heat-conducting component 1 and a battery 2. The battery 2 is provided with a heat-conducting channel 21. The heat-conducting component 1 includes a liquid cooling box 11 and multiple groups of heat-conducting units 12. The multiple groups of heat-conducting units 12 are arranged at intervals in the liquid cooling box 11. The heat-conducting units 12 include interconnected cooling channels 121, a liquid outlet 122, and a liquid inlet 123. The cooling channel 121 is located inside the liquid cooling box 11 and is hollow with both ends open. The coolant output by the coolant supply device can enter from the inlet 81 of the cooling channel 121. The coolant then flows through the outlet 122, the heat-conducting channel 21 inside the battery 2, the liquid inlet 123, and the cooling channel 121 in sequence, and is finally discharged from the outlet 82 of the cooling channel 121. The coolant can form a circulating flow in the cooling channel. The liquid outlet 122 and the liquid inlet 123 are both located between the inlet and outlet of the cooling channel 121 . The liquid cooling box 12 is connected to the battery 2 . The liquid outlet 122 and the liquid inlet 123 are respectively connected to the inlet and outlet of the heat conduction channel 21 .

[0027] In one embodiment, see Figure 3 The heat transfer unit 12 also includes a partition 124 disposed in the cooling channel 121. The partition 124 divides the cooling channel 121 into a first cavity 125 and a second cavity 126. The first cavity 125 connects the liquid outlet 122 and the inlet of the cooling channel 121, while the second cavity 126 connects the liquid inlet 123 and the outlet of the cooling channel 121. In this embodiment, the coolant enters the first cavity 125 from the inlet of the cooling channel 121, then passes through the liquid outlet 122, the heat transfer channel 21 inside the battery 2, the liquid inlet 123, and the second cavity 126 in sequence, and finally is discharged from the outlet of the cooling channel 121. The partition 124 divides the cooling channel 121 into two cavities, which facilitates the coolant to flow more quickly and smoothly from the first cavity 125 through the heat transfer channel 21 inside the battery 2 and then into the second cavity 126, thereby increasing the circulation speed of the coolant inside the battery 2 and improving the heat exchange efficiency of the battery 2.

[0028] In one embodiment, see Figure 2The number of liquid inlets 123 and liquid outlets 122 is multiple, and the multiple liquid inlets 123 are evenly spaced along the length of the first cavity 125, and the multiple liquid outlets 122 are evenly spaced along the length of the second cavity 126. Adjacent liquid inlets 123 and liquid outlets 122 can be connected to the corresponding battery's heat conduction channel. In this embodiment, the adjacent liquid inlets 123 and liquid outlets 122 can be understood as two outlets symmetrical about the partition 124, or as a pair of outlets. Figure 2 In the embodiment shown, there are multiple pairs of liquid inlets 123 and liquid outlets 122. Each pair of liquid inlets 123 and liquid outlets 122 can be connected to the heat conduction channel 21 of one battery 2. Multiple pairs of liquid inlets 123 and liquid outlets 122 can be connected to the heat conduction channels 21 of multiple batteries 2. Figure 2 The illustrated embodiment includes two heat transfer units 12, each equipped with ten pairs of liquid inlets 123 and liquid outlets 122, capable of connecting to the heat transfer channels 21 of ten batteries 2. During operation, coolant in the first cavity 125 simultaneously enters the heat transfer channels 21 of ten batteries 2 through the ten liquid outlets 122, performing heat exchange within the ten batteries 2, and then enters the second cavity 126 through the ten liquid inlets 123. This shows that the coolant in this embodiment can simultaneously exchange heat with multiple batteries 2, thereby improving heat dissipation efficiency.

[0029] In one embodiment, see Figure 4 The battery 2 includes a shell 22, a current collecting plate 23 and a battery cell 24. The current collecting plate 23 is provided at the top of the shell 22 and is used to connect the positive and negative electrodes of the battery cell 24. The two protrusions of the current collecting plate 23 are used to connect the positive and negative electrodes of the electrical equipment to supply power to the electrical equipment. The battery cell 24 is located inside the shell 22. The heat conduction channel 21 opened in the battery cell 24 is in a continuously curved shape, so that the contact area between the coolant and the inside of the battery 1 is larger. When the coolant flows in the heat conduction channel 21, the coolant can take away more battery heat per unit time, thereby improving the heat dissipation efficiency of the battery 1. The inlet and outlet of the heat conduction channel 21 are located on the same side of the battery 1. The inlet and outlet also serve to connect the battery 2 with the liquid cooling box 11, so that the connection between the battery 2 and the liquid cooling box 11 is more convenient.

[0030] In one embodiment, see Figure 2The heat transfer unit 12 also includes a first connecting tube 127 and a second connecting tube 128, which are spaced apart and disposed within the liquid cooling housing 11. One end of the first connecting tube 127 and one end of the second connecting tube 128 communicate with the first cavity 125 and the second cavity 126, respectively. The other ends of the first connecting tube 127 and the other ends of the second connecting tube 128 are removably plugged into the inlet and outlet of the heat transfer channel 21, respectively, to facilitate assembly and disassembly of the battery 2 and the liquid cooling housing 11. The ends of the first connecting tube 127 and the second connecting tube 128, which are located away from the liquid cooling housing 11, respectively, are the liquid outlet 122 and the liquid inlet 123, which are used to connect the two ends of the heat transfer channel 21 within the battery 2.

[0031] In one embodiment, see Figure 2 The battery pack 100 further includes an upper cover 8, which is connected to the liquid cooling box 11 and forms a receiving cavity between the upper cover 8 and the liquid cooling box 11, and the battery 2 is located in the receiving cavity.

[0032] In one embodiment, see Figure 2 The inner wall of the upper cover 8 is provided with a plurality of spaced ridges (not shown) along its circumference. The ridges are connected to the side walls of the battery 2. The heat of the battery 2 can be conducted to the upper cover 8 through the ridges, thereby dissipating the heat through the upper cover 8. The upper cover 8 can be made of an insulating material with strong thermal conductivity, such as alumina ceramic.

[0033] In one embodiment, see Figure 2 There are multiple batteries 2 that are interconnected. Each battery 2 is connected to the liquid cooling box 11 and arranged along the coolant flow direction of the cooling channel 121. The inlet of the heat conduction channel 21 of each battery 2 is connected to the first cavity 125, and the outlet of the heat conduction channel 21 of each battery 2 is connected to the second cavity 126. In this embodiment, the coolant in the first cavity 125 can simultaneously enter the heat conduction channels 21 of multiple batteries 2 and then be discharged into the second cavity 126 through the multiple heat conduction channels 21. This structure can simultaneously conduct heat to multiple batteries 2, improving heat dissipation efficiency.

[0034] In one embodiment, see Figure 2The battery pack 100 also includes a binding ring 3, a first end plate 4, and a second end plate 5. The first and second end plates 4, 5 are located at both ends of the multiple batteries 2. The binding ring 3 is connected to the first and second end plates 4, 5 to clamp and secure the multiple batteries 2. Multiple batteries 2 can be connected in series to increase the storage capacity and improve the battery life of electrical devices. In this embodiment, there are two binding rings 3, spaced one above the other, each of which is connected to the multiple batteries 2 to ensure a more stable connection. In other embodiments, the number of binding rings 3 is not limited and can be one, three, or more. The material of the binding ring 3 is not limited. For example, the binding ring 3 can be a steel belt, and the size of the steel belt can be adjusted according to the number of batteries 2. In other embodiments, the binding ring 3 can also be configured as an adjustable structure, such as a belt-like structure, to facilitate adaptive adjustment according to the number of batteries 2.

[0035] The first and second end plates 4, 5 are both made of metal, such as aluminum alloy. They are attached to the ends of the multiple battery cells 2. The aluminum alloy of the first and second end plates 4, 5 facilitates rapid heat transfer from the battery cells 2, further dissipating heat. Each of the first and second end plates 4, 5 has multiple heat dissipation holes 51 extending therethrough. These holes 51 increase the heat dissipation area of ​​the corresponding end plates, thereby improving the heat dissipation efficiency of the battery pack.

[0036] In one embodiment, see Figure 2 The battery pack 100 further includes a temperature sensor 6, which is disposed within the liquid cooling housing 11 and in contact with the battery 2. The temperature sensor 6 is configured to provide feedback on the battery 2 temperature. In this embodiment, the temperature sensor 6 is configured to transmit the sensed battery 2 temperature to a control terminal connected to a coolant supply device. The control terminal can control the coolant supply device to adjust the coolant output rate based on the battery temperature feedback from the temperature sensor 6. When the battery 2 temperature is high, the coolant output rate can be increased to more quickly remove heat from the battery 2; conversely, the coolant output rate can be reduced.

[0037] In order to better understand the present invention, the following Figures 1 to 4 The technical solution of the utility model is described in detail:

[0038] The heat conduction unit 12 is used to conduct heat to the batteries 2 in the corresponding area. Each heat conduction unit 12 is separately connected to the corresponding coolant supply device. Multiple coolant supply devices can be prepared. Each coolant supply device conducts heat to multiple batteries 2 corresponding to the heat conduction unit 12, which can achieve regional control. The required thermal conductivity efficiency is different for different types of batteries 2. Therefore, the multiple heat conduction units 12 set by the liquid cooling box 11 of the present application can be used to perform heat exchange on different types of batteries 2, and have strong compatibility. In addition, the coolant can pass through the interior of the battery 2. Compared with the existing heat exchange of the battery through the battery surface, the heat dissipation efficiency of the battery 2 in the present application is significantly higher.

[0039] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A battery pack, characterized in that: include: The battery is provided with a heat conduction channel; as well as A heat conduction component includes a liquid cooling box and multiple groups of heat conduction units, the liquid cooling box is connected to the battery, and the multiple groups of heat conduction units are arranged at intervals in the liquid cooling box, each group of heat conduction units has a connected cooling channel, a liquid outlet and a liquid inlet, the liquid outlet and the liquid inlet are both located between the inlet and outlet of the cooling channel, and the liquid outlet and the liquid inlet are respectively connected to the inlet and outlet of the heat conduction channel.

2. The battery pack according to claim 1, wherein: The heat conduction component also includes a partition provided in the cooling channel, the partition divides the cooling channel into a first cavity and a second cavity, the first cavity is connected to the liquid outlet and the inlet of the cooling channel, and the second cavity is connected to the liquid inlet and the outlet of the cooling channel.

3. The battery pack according to claim 2, wherein: There are multiple liquid inlets and multiple liquid outlets, and the multiple liquid inlets are evenly spaced along the length direction of the first cavity. The multiple liquid outlets are evenly spaced along the length direction of the second cavity, and adjacent liquid inlets and liquid outlets can be connected to the corresponding heat conduction channels of the batteries.

4. The battery pack according to claim 1, wherein: The heat conduction channel is in a continuously curved shape.

5. The battery pack according to claim 2, wherein: The heat conduction unit also includes a first connecting pipe and a second connecting pipe provided in the liquid cooling box and spaced apart from each other, one end of the first connecting pipe and one end of the second connecting pipe being connected to the first cavity and the second cavity respectively, and the other end of the first connecting pipe and the other end of the second connecting pipe being detachably plugged into the inlet and outlet of the heat conduction channel respectively.

6. The battery pack according to claim 1, wherein: The battery pack further includes an upper cover, which is connected to the liquid cooling box and forms a receiving cavity with the liquid cooling box. The battery is located in the receiving cavity.

7. The battery pack according to claim 6, characterized in that: The inner wall of the upper cover is provided with a plurality of convex strips arranged at intervals along its circumference, and the plurality of convex strips are all connected to the outer wall of the battery.

8. The battery pack according to claim 2, wherein: There are multiple batteries that are interconnected. All of the batteries are connected to the liquid cooling box and are arranged along the coolant flow direction of the cooling channel. The inlet of the heat conduction channel of each battery is connected to the first cavity, and the outlet of the heat conduction channel of each battery is connected to the second cavity.

9. The battery pack according to claim 1, wherein: The battery pack further includes a binding ring, a first end plate and a second end plate, wherein the first end plate and the second end plate are located at both ends of the plurality of batteries, and the binding ring is sleeved on the first end plate and the second end plate to clamp and fix the plurality of batteries.

10. The battery pack according to claim 1, wherein: The battery pack further includes a temperature sensor, which is disposed in the liquid cooling box and contacts the battery. The temperature sensor is used to feed back the temperature of the battery.

Images