Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, the battery pack comprises a shell, a heat exchange structure, a distribution box and a protection structure, the heat exchange structure is accommodated in the shell; the distribution box is accommodated in the shell; the protection structure is arranged between the distribution box and the heat exchange structure, and the protection structure is used for buffering when the battery pack is impacted. According to the battery pack and the electric equipment provided by the invention, the protection structure is arranged between the distribution box and the heat exchange structure, and the protection structure can provide a buffer effect on the distribution box to protect the distribution box when the bottom of the shell of the battery pack is impacted, so that the probability that internal components of the distribution box are damaged due to deformation of the bottom of the shell can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of battery packs, and in particular, relates to a battery pack and an electrical device. Background Art

[0002] In existing battery packs, the protective plate at the bottom of the battery pack is usually formed of glass fiber / polyurethane, steel, or glass fiber / polyurethane. Due to the impact on the cost, weight, and installation structure of the battery pack, the effective protection area of ​​the protective plate at the bottom of the battery pack only covers the battery cell part of the battery pack, and the area at the bottom corresponding to the distribution box of the battery pack is not covered by the effective protection area of ​​the protective plate. When the bottom of the battery pack is subjected to a high-energy impact, the area at the bottom of the shell corresponding to the distribution box is prone to deformation, which in turn causes damage to the distribution box and affects the overall performance of the battery pack. Utility Model Content

[0003] In order to address the deficiencies in the prior art, the present application provides a battery pack and electrical equipment whose bottom can withstand impacts with relatively high energy.

[0004] In one aspect, the present application provides a battery pack, comprising:

[0005] case;

[0006] A heat exchange structure is accommodated in the shell;

[0007] a distribution box, housed in the housing; and

[0008] A protective structure is arranged between the power distribution box and the heat exchange structure, and the protective structure is used to buffer when the battery pack is impacted.

[0009] In a possible implementation, the protective structure includes a support member and a buffer member, wherein the buffer member is coated on the outside of the support member; the buffer member is used to provide buffering for the support member and the distribution box, and the buffer member is also used to provide buffering for the support member and the heat exchange structure.

[0010] In a possible embodiment, the support member includes a top plate, a bottom plate and a plurality of connecting plates, the plurality of connecting plates are sequentially and spaced apart between the top plate and the bottom plate, the top plate, the bottom plate and the plurality of connecting plates together form a plurality of receiving cavities; the buffer member covers the outer surface of the support member and the inner surfaces of the plurality of receiving cavities.

[0011] In a possible embodiment, the buffer member in the receiving cavity forms a receiving cavity, the protective structure also includes an adsorption member, and the adsorption member includes a first part and a second part connected to each other, the first part is embedded in the receiving cavity, and the second part passes through the buffer member and the support member and contacts with the heat exchange structure.

[0012] In a possible embodiment, the protective structure also includes an adhesive component, which is arranged on the side of the buffer component facing the heat exchange structure, and is used to fix the support component, the buffer component and the adsorption component to the heat exchange structure; the second part passes through the adhesive component and contacts with the heat exchange structure.

[0013] In a possible implementation, the support member is made of aluminum.

[0014] In a possible implementation, the material of the buffer element includes ceramic silicone foam.

[0015] In a possible implementation manner, the protective structure further includes a protective layer, and the protective layer covers the surface of the buffer component.

[0016] In a possible implementation, the material of the protective layer includes a polytetrafluoroethylene coating.

[0017] In a possible implementation, the material of the adsorbent includes porous electrolyte-resistant sponge.

[0018] In a possible implementation manner, the heat exchange structure and the protective structure are both plate-shaped structures, and a side of the heat exchange structure facing the protective structure is in contact with a side of the protective structure facing the heat exchange structure.

[0019] On the other hand, the present application provides an electrical device, including:

[0020] The battery pack described above.

[0021] The battery pack and electrical equipment provided in the present application, by setting a protective structure between the distribution box and the heat exchange structure, the protective structure can provide a buffering effect on the distribution box to protect the distribution box when the bottom of the battery pack shell is impacted, thereby reducing the probability of damage to internal components of the distribution box due to deformation of the bottom of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation methods provided by the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a cross-sectional view of a battery pack provided in one embodiment of the present application;

[0024] Figure 2is a structural diagram of a protective structure provided by an embodiment of the present application;

[0025] Figure 3 is an exploded view of a protective structure provided by an embodiment of the present application;

[0026] Figure 4 It is a cross-sectional view of a protective structure provided in one embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solution of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0028] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The directional terms mentioned in the description of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "top", "side", "bottom", "top wall", "side wall", "bottom wall", "inner side wall", "outer side wall", "length direction", "width direction", "height direction", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, for example, "first", "second", "third", "fourth", etc., are only used to distinguish the objects described and do not have any order or technical meaning. In the description of the present application, the "connection" and "connection" involved, if not otherwise specified, include direct connection (connection) and indirect connection (connection).

[0029] The present application provides an electric device. In this embodiment, the electric device is a vehicle. The electric device has a battery pack, and the battery pack is used to power the vehicle so that the vehicle can operate normally. It is understandable that in some other embodiments, the battery pack can be applied to other electric devices such as engineering machinery and agricultural machinery, and the present application does not limit this.

[0030] In existing battery packs, the protective plate at the bottom of the battery pack is usually formed of glass fiber / polyurethane, steel, or glass fiber / polyurethane. Due to the impact of factors such as the overall cost, weight, and installation structure of the battery pack and electrical equipment, the effective protection area of ​​the protective plate at the bottom of the battery pack only covers the battery cell part of the battery pack, and the area at the bottom corresponding to the distribution box of the battery pack is not covered by the effective protection area of ​​the protective plate. When the battery pack is used in a vehicle, when the bottom of the battery pack is subjected to a high-energy impact during driving, the area at the bottom of the shell corresponding to the distribution box is prone to deformation, which in turn causes damage to the distribution box and affects the overall performance of the battery pack.

[0031] In view of the problems arising from the above-mentioned prior art, the present application provides a battery pack capable of withstanding impacts with relatively large energy.

[0032] See also Figure 1 , Figure 1 It is a cross-sectional view of a battery pack provided in one embodiment of the present application.

[0033] This embodiment provides a battery pack 100 , including a housing assembly 10 , a heat exchange structure 20 , a battery cell module 30 , a distribution box 40 and a protective structure 50 .

[0034] The shell assembly 10 has a receiving space 11, the heat exchange structure 20 is arranged in the receiving space 11, the battery cell module 30 is arranged in the receiving space 11 and is located on the heat exchange structure 20, so that the heat of the battery cell module 30 is dissipated through the heat exchange structure 20, the distribution box 40 is arranged in the receiving space 11 and is located on the heat exchange structure 20, so that the heat of the distribution box 40 is dissipated through the heat exchange structure 20, and the protective structure 50 is arranged between the distribution box 40 and the heat exchange structure 20. The protective structure 50 is used to buffer the distribution box 40 when the battery pack 100 is impacted.

[0035] The battery pack 100 provided in this embodiment has a protective structure 50 disposed between the distribution box 40 and the heat exchange structure 20. The protective structure 50 can provide a buffering effect on the distribution box 40 to protect the distribution box 40 when the bottom of the shell 12 of the battery pack 100 is impacted. This can reduce the probability of damage to internal components of the distribution box 40 due to deformation of the bottom of the shell 12, thereby ensuring the performance of the battery pack 100 and the vehicle.

[0036] In a specific embodiment, the heat exchange structure 20 and the protective structure 50 are both plate-like structures, and the side of the heat exchange structure 20 facing the protective structure 50 is in contact with the side of the protective structure 50 facing the heat exchange structure 20. In other words, the heat exchange structure 20 is a plate-like structure, and the protective structure 50 is also a plate-like structure. The heat exchange structure 20 and the protective structure 50 are stacked so that the heat exchange structure 20 and the protective structure 50 are in surface contact, so that the protective structure 50 can provide a buffering effect on the distribution box 40, which is beneficial to reduce the probability of damage to the internal components of the distribution box 40 due to deformation of the bottom of the shell 12, thereby ensuring the performance of the battery pack 100 and the vehicle.

[0037] See also Figure 1 In a specific embodiment, the shell assembly 10 includes a shell 12, a protective bottom plate 13 and a foamed plate 14. The protective bottom plate 13 is arranged at the bottom of the shell 12 away from the heat exchange structure 20, and the protective bottom plate 13 is used to protect the bottom of the battery pack 100. The foamed plate 14 is arranged between the shell 12 and the heat exchange structure 20, and the foamed plate 14 is used to provide a buffering effect between the shell 12 and the heat exchange structure 20. Among them, the foamed plate 14 includes microporous foamed polypropylene, and the pore size of the foamed plate 14 is less than 100μm. It can be understood that in some other embodiments, the foamed plate 14 can also be made of materials such as EPS and EPP.

[0038] See also Figure 1 In a specific embodiment, the heat exchange structure 20 is a cold plate, and the heat exchange structure 20 includes a temperature averaging plate 21 and a flow channel plate 22. The temperature averaging plate 21 is arranged in the shell 12, and the flow channel plate 22 is arranged on the side of the temperature averaging plate 21 facing the shell 12. The flow channel plate 22 and the temperature averaging plate 21 enclose a temperature averaging flow channel 23, and the temperature averaging flow channel 23 is used for the flow of heat dissipation medium to dissipate heat from the temperature averaging plate 21. Among them, the battery cell module 30 and the distribution box 40 are both arranged on the temperature averaging plate 21, and a protective structure 50 is arranged between the distribution box 40 and the temperature averaging plate 21. The temperature averaging plate 21 is used to dissipate heat from the battery cell module 30 and the distribution box 40 to reduce the probability of overheating of the battery cell module 30 and the distribution box 40, thereby improving the stability of the battery pack 100 during operation.

[0039] See also Figures 1 to 4 , Figure 2 is a structural diagram of a protective structure provided by an embodiment of the present application, Figure 3 is an exploded view of a protective structure provided by an embodiment of the present application. Figure 4 It is a cross-sectional view of a protective structure provided in one embodiment of the present application.

[0040] In one embodiment, the protective structure 50 includes a support member 51 and a buffer member 52, and the buffer member 52 is coated on the outside of the support member 51. The buffer member 52 is used to provide buffering for the support member 51 and the distribution box 40, and the buffer member 52 is also used to provide buffering for the support member 51 and the temperature averaging plate 21 of the heat exchange structure 20.

[0041] The battery pack 100 provided in this embodiment provides rigid support between the distribution box 40 and the temperature equalizing plate 21 through the support member 51, and provides flexible support between the side of the support member 51 close to the distribution box 40 and the distribution box 40 through the buffer member 52. The buffer member 52 also provides flexible support between the side of the support member 51 close to the temperature equalizing plate 21 and the temperature equalizing plate 21, so that when the bottom of the shell 12 of the battery pack 100 is impacted, the support member 51 and the buffer member 52 can provide a buffering effect on the distribution box 40 to protect the distribution box 40, which can reduce the probability of damage to internal components of the distribution box 40 due to deformation of the bottom of the shell 12, thereby ensuring the performance of the battery pack 100 and the vehicle.

[0042] In a specific embodiment, the distribution box 40 is fastened to the temperature averaging plate 21 of the heat exchange structure 20 by bolts, and the distribution box 40 is pressed against the buffer 52 of the protective structure 50, so that the distribution box 40 compresses the buffer 52. At this time, the distribution box 40 and the protective structure 50 are tightly fitted, and the protective structure 50 and the temperature averaging plate 21 of the heat exchange structure 20 are tightly fitted.

[0043] In the battery pack 100 provided in this embodiment, on the one hand, the heat generated by the distribution box 40 can be transferred to the temperature averaging plate 21 of the heat exchange structure 20 through the buffer 52 and the support 51 of the protective structure 50, thereby reducing the overall temperature of the distribution box 40, which is beneficial to improving the service life of the distribution box 40 and the battery pack 100. On the other hand, the distribution box 40 is tightly fitted with the protective structure 50, and when the battery pack 100 vibrates, the distribution box 40 will not directly collide with the temperature averaging plate 21 of the heat exchange structure 20, which is beneficial to reducing the noise generated by the battery pack 100 during vibration. On the other hand, since the distribution box 40 and the temperature averaging plate 21 of the heat exchange structure 20 are separated by the protective structure 50, when the distribution box 40 is heated, there is no hot air directly contacting the temperature averaging plate 21 in the area of ​​the temperature averaging plate 21 corresponding to the protective structure 50, which can reduce the generation of condensed water in the area of ​​the temperature averaging plate 21 corresponding to the distribution box 40, thereby reducing the occurrence of short circuits in the components inside the distribution box 40.

[0044] In a specific embodiment, the material of the support member 51 includes aluminum. Since the support member 51 is made of aluminum, aluminum has good thermal conductivity, and the heat generated by the distribution box 40 can be quickly transferred to the temperature balancing plate 21 through the support member 51 to achieve heat dissipation, which is beneficial to improving the heat dissipation efficiency of the distribution box 40.

[0045] See also Figures 1 to 4 In a specific embodiment, the material of the buffer 52 includes ceramic silicone foam. The buffer 52 is made of ceramic silicone foam, and the ceramic silicone foam has good resilience, good weather resistance, good waterproofness, good working stability and other characteristics, so that the buffer 52 can have a good buffering and shock absorbing effect on the distribution box 40. At the same time, if the battery cell module 30 of the battery pack 100 sprays high-temperature mixed gas due to thermal runaway, the ceramic silicone foam can be vitrified to form a hard shell 12, which can prevent the components inside the distribution box 40 from directly contacting the temperature averaging plate 21 and causing a short circuit.

[0046] Furthermore, the buffer 52 includes a protective layer, which covers the surface of the buffer 52, and the protective layer is used to prevent the electrolyte in the battery module 30 from corroding the buffer 52. By providing the protective layer on the surface of the buffer 52, the buffer 52 has better corrosion resistance to the electrolyte in the battery module 30, thereby improving the stability of the protective structure 50.

[0047] Furthermore, the surface of the buffer 52 may be formed with a layer of polytetrafluoroethylene to form the protective layer. It is understandable that in some other embodiments, the material forming the protective layer may be other materials, and the present application does not limit this.

[0048] See also Figures 1 to 4 In a specific embodiment, the support member 51 includes a top plate 511, a bottom plate 512 and a plurality of connecting plates 513, and the plurality of connecting plates 513 are sequentially arranged between the top plate 511 and the bottom plate 512. The top plate 511, the bottom plate 512 and the plurality of connecting plates 513 enclose a plurality of receiving cavities 514, and the buffer member 52 covers the outer surface of the support member 51 and the inner surface of the plurality of receiving cavities 514.

[0049] In the battery pack 100 provided in this embodiment, when the bottom area of ​​the temperature equalizing plate 21 corresponding to the distribution box 40 is severely deformed, the buffer member 52 can undergo elastic deformation relative to the support member 51, so as to absorb the impact of external energy on the distribution box 40, thereby protecting the distribution box 40.

[0050] See also Figures 1 to 4 In a specific embodiment, the buffer member 52 in the receiving cavity 514 encloses a receiving cavity 521. The protective structure 50 also includes an adsorbent 53, which is used to absorb and store the electrolyte flowing out of the battery cell module 30 of the battery pack 100. The adsorbent 53 includes a first portion 531 and a second portion 532 connected to each other, the first portion 531 is embedded in the receiving cavity 521, and the second portion 532 passes through the buffer member 52 and the support member 51 and contacts the temperature balancing plate 21 of the heat exchange structure 20.

[0051] The battery pack 100 provided in this embodiment is provided with a buffer member 52 and a support member 51 through the second portion 532 of the adsorption member 53 and in contact with the temperature equalizing plate 21 of the heat exchange structure 20. When the electrolyte flowing out of the battery cell module 30 due to damage flows to the temperature equalizing plate 21 corresponding to the protective structure 50, the adsorption member 53 can adsorb and store the electrolyte flowing to the temperature equalizing plate 21 corresponding to the protective structure 50 through the second portion 532, so as to reduce the risk caused by the flow of electrolyte in the battery pack 100.

[0052] Furthermore, the material of the adsorbent 53 includes a porous electrolyte-resistant sponge. The adsorbent 53 is made of a porous electrolyte-resistant sponge, so that the adsorbent 53 can better adsorb and store the electrolyte flowing out of the battery module 30. At the same time, the adsorbent 53 made of the porous electrolyte-resistant sponge has a buffering effect, so that the adsorbent 53 can provide buffering protection to the distribution box 40 together with the support member 51 and the buffer member 52.

[0053] Furthermore, there are multiple adsorbents 53, and the second portion 532 of each adsorbent 53 is disposed on the side of the first portion 531 facing the heat spreader, and there are two second portions 532, which are disposed on the first portion 531 at intervals, and each second portion 532 penetrates the buffer 52 and the support 51 and contacts the heat spreader 21. It can be understood that in some other embodiments, the number of the second portion 532 of each adsorbent 53 can be 1, 3, 4, etc., and the present application does not limit this.

[0054] See also Figures 1 to 4 In a specific embodiment, the protective structure 50 further includes an adhesive member 54, which is disposed on the side of the buffer member 52 facing the heat exchange structure 20, and is used to fix the support member 51, the buffer member 52, and the adsorbent member 53 to the temperature averaging plate 21 of the heat exchange structure 20. The second portion 532 is penetrated by the adhesive member 54 and contacts the temperature averaging plate 21 of the heat exchange structure 20. The support member 51, the buffer member 52, and the adsorbent member 53 are fixed to the temperature averaging plate 21 of the heat exchange structure 20 by the adhesive member 54, so that the stability of the protective structure 50 in the battery pack 100 is better.

[0055] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A battery pack, characterized in that: include: case; A heat exchange structure is accommodated in the shell; A distribution box, housed in the housing; as well as A protective structure is arranged between the power distribution box and the heat exchange structure, and the protective structure is used to buffer when the battery pack is impacted.

2. The battery pack according to claim 1, characterized in that: The protective structure includes a support member and a buffer member, wherein the buffer member is coated on the outside of the support member; the buffer member is used to provide buffering for the support member and the distribution box, and the buffer member is also used to provide buffering for the support member and the heat exchange structure.

3. The battery pack according to claim 2, characterized in that: The support member includes a top plate, a bottom plate and a plurality of connecting plates, wherein the plurality of connecting plates are sequentially and spaced apart between the top plate and the bottom plate, and the top plate, the bottom plate and the plurality of connecting plates together form a plurality of receiving cavities; the buffer member covers the outer surface of the support member and the inner surfaces of the plurality of receiving cavities.

4. The battery pack according to claim 3, characterized in that: The buffer member in the receiving cavity forms a receiving cavity, and the protective structure also includes an adsorption member, and the adsorption member includes a first part and a second part connected to each other, the first part is embedded in the receiving cavity, and the second part passes through the buffer member and the support member and contacts with the heat exchange structure.

5. The battery pack according to claim 4, characterized in that: The protective structure also includes an adhesive component, which is arranged on a side of the buffer component facing the heat exchange structure, and is used to fix the support component, the buffer component and the adsorption component on the heat exchange structure; the second part passes through the adhesive component and contacts with the heat exchange structure.

6. The battery pack according to claim 2, characterized in that: The material of the support member includes aluminum.

7. The battery pack according to claim 2, characterized in that: The material of the buffer element includes ceramic silicone foam.

8. The battery pack according to claim 6, wherein: The protection structure further includes a protection layer, and the protection layer covers the surface of the buffer.

9. The battery pack according to claim 8, characterized in that: The material of the protective layer includes polytetrafluoroethylene coating.

10. The battery pack according to claim 4, characterized in that: The material of the adsorbent includes porous electrolyte-resistant sponge.

11. The battery pack according to claim 1, wherein: The heat exchange structure and the protective structure are both plate-shaped structures, and a side of the heat exchange structure facing the protective structure is in contact with a side of the protective structure facing the heat exchange structure.

12. An electrical device, characterized in that: include: A battery pack as claimed in any one of claims 1 to 11.

Images