Double-layer battery module

By using a middle plate and thermally conductive adhesive to separate the cell components in the double-layer battery module, and combining it with insulating strips and buffer pads, the problems of height and temperature unevenness in the double-layer battery module are solved, resulting in a smaller structure and better thermal management.

CN223911761UActive Publication Date: 2026-02-13HANRUI POWER (XIAMEN) NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202423290746.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2026-02-13
Estimated Expiration
2034-12-31

AI Technical Summary

Technical Problem

Existing double-layer battery module structures are relatively tall and have uneven temperatures, resulting in heat concentration and insufficient bolt stress.

Method used

The upper and lower battery cell assemblies are separated by a middle clamp and thermally conductive adhesive. Heat is conducted by the fact that the thickness of the middle clamp is greater than that of the side plates. At the same time, insulating strips and buffer pads are used to improve connection strength and heat uniformity.

Benefits of technology

This achieves a reduction in the height of the dual-layer battery module and good temperature uniformity, avoiding problems such as heat accumulation and uneven bolt stress, and enhancing connection strength and heat conduction.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223911761U_ABST
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Abstract

The utility model discloses a double-layer battery module. The double-layer battery module comprises an upper side plate, a lower side plate, a middle clamping plate, an upper battery cell assembly, a lower battery cell assembly and two module end plates, the two module end plates are oppositely arranged, and the two module end plates clamp the upper battery cell assembly and the lower battery cell assembly; the upper side plate is connected with the upper connecting faces of the two module end plates, the lower side plate is connected with the lower connecting faces of the two module end plates, and the two ends of the middle clamping plate penetrate through the receding openings of the two module end plates and then are connected with the middle connecting faces of the two module end plates. The upper battery cell assembly comprises a plurality of upper battery cells which are arranged between the upper side plate and the middle clamping plate side by side, and each upper battery cell is respectively adhered to the upper side plate and the middle clamping plate through heat-conducting glue; the lower battery cell assembly comprises a plurality of lower battery cells which are arranged between the lower side plate and the middle clamping plate side by side; each lower battery cell is respectively adhered to the lower side plate and the middle clamping plate through heat-conducting glue. The double-layer battery module disclosed by the utility model has the advantages of small height and good temperature uniformity.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a battery module, in particular to a double-layer battery module. BACKGROUND

[0002] The existing double-layer battery module adopts the following structural forms:

[0003] The first structural form: first fix the lower battery module into the case, then set the support above the lower battery module, and then fix the upper battery module on the support; the double-layer battery module of the first structural form needs four end plates and a support, and the height is large;

[0004] The second structural form: first connect the upper battery module and the lower battery module together by the support, and then fix the upper module and the lower module together into the case by the long screw; the double-layer battery module of the second structural form also needs four end plates and a support, and the height is large;

[0005] The third structural form: first place the lower battery module into the case, then place the upper battery module above the lower battery module, and align the support points of the upper battery module and the lower battery module, and finally fix the upper module and the lower module together into the case by the long screw; the double-layer battery module of the third structural form needs four end plates, and the height is large;

[0006] The fourth structural form: directly stack the two layers of battery cells, set the end plates at both ends of the two layers of battery cells respectively, and lock the two end plates by the long screw; when the battery cells of the double-layer battery module of the fourth structural form expand, the stress of the bolt is not enough; in addition, heat is concentrated in the middle of the two layers of battery cells during use, which causes that the temperature difference of the double-layer battery module is large.

[0007] In view of the above problems, it is necessary to study a double-layer battery module which has the advantages of small height and good temperature uniformity. UTILITY MODEL CONTENTS

[0008] The utility model aims at providing a double-layer battery module which has the advantages of small height and good temperature uniformity.

[0009] In order to achieve the above purpose, the solution of the utility model is:

[0010] A double-layer battery module comprises an upper side plate, a lower side plate, a middle clamping plate, an upper cell assembly, a lower cell assembly, and two module end plates; the two module end plates are oppositely arranged, the module end plates are in a stepped shape, the module end plates have an upper connecting surface, a middle connecting surface and a lower connecting surface arranged in sequence from top to bottom, and the module end plates are provided with a clearance corresponding to the middle connecting surface; the upper side plate is connected with the upper connecting surfaces of the two module end plates respectively, the lower side plate is connected with the lower connecting surfaces of the two module end plates respectively, the two ends of the middle clamping plate pass through the clearances of the two module end plates respectively and the two ends of the middle clamping plate are connected with the middle connecting surfaces of the two module end plates respectively, and the thickness of the middle clamping plate is greater than the thicknesses of the upper side plate and the lower side plate; the upper cell assembly comprises a plurality of upper cells arranged side by side between the upper side plate and the middle clamping plate, and each upper cell is adhered to the upper side plate and the middle clamping plate by heat-conducting glue respectively; the two module end plates clamp the upper cell assembly; the lower cell assembly comprises a plurality of lower cells arranged side by side between the lower side plate and the middle clamping plate, and each lower cell is adhered to the lower side plate and the middle clamping plate by heat-conducting glue respectively, and the two module end plates clamp the lower cell assembly.

[0011] Two upper insulation strips are arranged between the upper cell assembly and the upper side plate, and the two upper insulation strips protrude from the two sides of the upper side plate respectively.

[0012] Two lower insulation strips are arranged between the lower cell assembly and the lower side plate, and the two lower insulation strips protrude from the two sides of the lower side plate respectively.

[0013] A middle insulation strip is arranged on each side of the middle clamping plate, the middle insulation strip covers the side edge of the middle clamping plate, the upper side of the middle insulation strip is clamped between the middle clamping plate and the upper cell assembly, and the lower side of the middle insulation strip is clamped between the middle clamping plate and the lower cell assembly.

[0014] Two connecting portions are formed at each end of the middle clamping plate, and the module end plates are provided with two clearances corresponding to the middle connecting surface; the two connecting portions at each end of the middle clamping plate pass through the two clearances of one module end plate and are connected with the middle connecting surface of the module end plate.

[0015] The thickness of the middle clamping plate is 1.5-4 mm.

[0016] The module end plate has at least two through holes penetrating the middle connecting surface and the lower connecting surface of the module end plate.

[0017] An upper buffer pad is arranged between the upper cell assembly and the two module end plates.

[0018] A lower buffer pad is arranged between the lower cell assembly and the two module end plates.

[0019] The upper buffer pad and the lower buffer pad are both made of foam.

[0020] With the above scheme, the utility model discloses the space utilization of height direction is high by the middle clamping plate and the heat conduction glue water to separate the upper electric core assembly and the lower electric core assembly setting, help to reduce the height of the double-layer battery module of the utility model, in addition, each upper electric core of the upper electric core assembly is adhered with the upper side plate and the middle clamping plate through the heat conduction glue water, and each lower electric core of the lower electric core assembly is adhered with the lower side plate and the middle clamping plate through the heat conduction glue water, so that the heat of the upper electric core assembly and the lower electric core assembly can be conducted to the two sides, and the thickness of the middle clamping plate is greater than the thickness of the upper side plate and the lower side plate, so that the middle clamping plate can conduct the heat of the upper electric core assembly and the lower electric core assembly, avoid the heat of the upper electric core assembly and the lower electric core assembly to accumulate in the middle clamping plate, thereby guaranteeing that the temperature uniformity of the double-layer battery module of the utility model is good. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the assembly drawing of the utility model.

[0022] Figure 2 It is the structure schematic view of the utility model.

[0023] Figure 3 It is the local structure schematic view of the utility model.

[0024] Figure 4 It is the structure schematic of the module end plate of the utility model Figure 1 .

[0025] Figure 5 It is the structure schematic of the module end plate of the utility model Figure 2 .

[0026] Figure 6 It is the structure schematic view of the middle clamping plate of the utility model.

[0027] Figure 7 It is the structure schematic view of the middle insulation strip of the utility model.

[0028] Label explanation:

[0029] Upper side plate 1,

[0030] Lower side plate 2,

[0031] Middle clamping plate 3, connecting part 31,

[0032] Upper electric core assembly 4, upper electric core 41,

[0033] Lower electric core assembly 5, lower electric core 51,

[0034] Module end plate 6, upper connecting face 61, middle connecting face 62, lower connecting face 63, give way mouth 64, perforated hole 65,

[0035] Fixing bolt 7,

[0036] upper insulation strip a,

[0037] lower insulation strip b,

[0038] middle insulation strip c,

[0039] upper cushion d,

[0040] lower cushion e. DETAILED DESCRIPTION

[0041] In order to further explain the technical scheme of the utility model, the utility model will be described in detail through specific embodiments.

[0042] As Figures 1 to 7 shown, the utility model discloses a double -layer battery module, it includes upper side board 1, lower side board 2, middle clamping plate 3, upper electric core subassembly 4, lower electric core subassembly 5 and two module end plate 6, two module end plate 6 are oppositely arranged, and module end plate 6 is ladder -shaped, and module end plate 6 has upper connecting surface 61, middle connecting surface 62 and lower connecting surface 63 that are sequentially arranged from top to bottom, and module end plate 6 is equipped with the accommodation 64 of letting in corresponding middle connecting surface 62, upper side board 1 is connected with the upper connecting surface 61 of two module end plate 6 respectively, and lower side board 2 is connected with the lower connecting surface 63 of two module end plate 6 respectively, and the both ends of middle clamping plate 3 respectively pass through the accommodation 64 of letting in of two module end plate 6 and the both ends of middle clamping plate 3 are connected with the middle connecting surface 62 of two module end plate 6 respectively, and the thickness of middle clamping plate 3 is greater than the thickness of upper side board 1 and lower side board 2, upper electric core subassembly 4 includes a plurality of upper electric core 41 that are arranged side by side between upper side board 1 and middle clamping plate 3, and each upper electric core 41 is bonded with upper side board 1 and middle clamping plate 3 respectively through heat-conducting glue, and two module end plate 6 clamps upper electric core subassembly 4, lower electric core subassembly 5 includes a plurality of lower electric core 51 that are arranged side by side between lower side board 2 and middle clamping plate 3, and each lower electric core 51 is bonded with lower side board 2 and middle clamping plate 3 respectively through heat-conducting glue, and two module end plate 6 clamps lower electric core subassembly 5.

[0043] The utility model sets up through middle clamping plate 3 and heat-conducting glue and separates upper electric core subassembly 4 and lower electric core subassembly 5, so that the space utilization in height direction is high, help to reduce the height of double -layer battery module of the utility model, in addition, each upper electric core 41 of upper electric core subassembly 4 is bonded with upper side board 1 and middle clamping plate 3 respectively through heat-conducting glue, and each lower electric core 51 of lower electric core subassembly 5 is bonded with lower side board 2 and middle clamping plate 3 respectively through heat-conducting glue, so that the heat of upper electric core subassembly 4 and lower electric core subassembly 5 can be conducted to go out on both sides, and the thickness of middle clamping plate 3 is greater than the thickness of upper side board 1 and lower side board 2, so that middle clamping plate 3 can conduct the heat of upper electric core subassembly 4 and lower electric core subassembly 5 to go out, avoid the heat of upper electric core subassembly 4 and lower electric core subassembly 5 to accumulate in middle clamping plate 3, thereby guaranteeing that the temperature uniformity of double -layer battery module of the utility model is good.

[0044] In the embodiment of the utility model, two upper insulating strips a are arranged between the upper battery cell assembly 4 and the upper side plate 1 to separate the upper battery cell assembly 4 and the upper side plate 1, and the two upper insulating strips a respectively protrude from the two sides of the upper side plate 1 to avoid the burrs on the side edges of the upper side plate 1 from affecting the upper battery cell assembly 4. Similarly, two lower insulating strips b are arranged between the lower battery cell assembly 5 and the lower side plate 2 to separate the lower battery cell assembly 5 and the lower side plate 2, and the two lower insulating strips b respectively protrude from the two sides of the lower side plate 2 to avoid the burrs on the side edges of the lower side plate 2 from affecting the lower battery cell assembly 5.

[0045] In the embodiment of the utility model, the middle clamping plate 3 is sleeved with a middle insulating strip c on each side, the middle insulating strip c covers the side edges of the middle clamping plate 3, the upper side of the middle insulating strip c is clamped between the middle clamping plate 3 and the upper battery cell assembly 4, and the lower side of the middle insulating strip c is clamped between the middle clamping plate 3 and the lower battery cell assembly 5; in this way, the upper battery cell assembly 4 and the lower battery cell assembly 5 can be separated, and the burrs on the side edges of the middle clamping plate 3 can be avoided from affecting the upper battery cell assembly 4 and the lower battery cell assembly 5.

[0046] In the embodiment of the utility model, the two ends of the middle clamping plate 3 can each be formed with two connecting portions 31, and the module end plate 6 is provided with two accommodation openings 64 corresponding to the middle connecting surface 62; the two connecting portions 31 of each end of the middle clamping plate 3 respectively pass through the two accommodation openings 64 of one module end plate 6 and are connected to the middle connecting surface 62 of the module end plate 6. In this way, the connection strength of the middle clamping plate 3 and the module end plate 6 can be ensured, and the opening of the accommodation opening 64 can be avoided from being too large to affect the strength of the module end plate 6.

[0047] In the embodiment of the utility model, the thickness of the middle clamping plate 3 is 1.5-4 mm, so that the middle clamping plate 3 can effectively conduct the heat of the upper battery cell assembly 4 and the lower battery cell assembly 5 away while ensuring the strength, and the heat of the upper battery cell assembly 4 and the lower battery cell assembly 5 can be avoided from accumulating in the middle clamping plate 3.

[0048] In the embodiment of the utility model, the module end plate 6 has at least two through holes 65 penetrating the middle connecting surface 62 and the lower connecting surface 63 of the module end plate 6 for penetrating and fixing the fixing bolts 7, so that the double-layer battery module of the utility model can be fixed into the case through the fixing bolts 7; since the through holes 65 of the module end plate 6 penetrate the middle connecting surface 62 and the lower connecting surface 63 of the module end plate 6, the fixing bolts 7 only need to pass through the part of the module end plate 6 between the middle connecting surface 62 and the lower connecting surface 63, so that the length of the fixing bolts 7 can be effectively reduced, the stress on the fixing bolts 7 is more friendly, and the risk of failure is reduced.

[0049] In the embodiment of the utility model, the upper buffer pad d is arranged between the upper electric core assembly 4 and the two module end plates 6, the upper buffer pad d can absorb the acting force generated when the upper electric core assembly 4 expands, and the upper electric core assembly 4 and the module end plate 6 are prevented from being damaged. Similarly, the lower buffer pad e is arranged between the lower electric core assembly 5 and the two module end plates 6, the lower buffer pad e can absorb the acting force generated when the lower electric core assembly 5 expands, and the lower electric core assembly 5 and the module end plate 6 are prevented from being damaged. The upper buffer pad d and the lower buffer pad e can both adopt foam.

[0050] The above embodiment and drawing are not limited to the product shape and style of the utility model, and any ordinary technical personnel in the technical field can make appropriate changes or modifications, which should be considered as not departing from the patent category of the utility model.

Claims

1. A dual-layer battery module, characterized by: The battery module comprises an upper side plate, a lower side plate, a middle clamping plate, an upper battery cell assembly, a lower battery cell assembly, and two module end plates; The two module end plates are oppositely arranged, and the module end plates are in a stepped shape, and the module end plates have an upper connecting surface, a middle connecting surface and a lower connecting surface arranged in sequence from top to bottom, and the module end plates are provided with a clearance corresponding to the middle connecting surface; The upper side plate is connected with the upper connecting surfaces of the two module end plates respectively, the lower side plate is connected with the lower connecting surfaces of the two module end plates respectively, and the two ends of the middle clamping plate pass through the clearances of the two module end plates respectively and are connected with the middle connecting surfaces of the two module end plates respectively, and the thickness of the middle clamping plate is greater than the thicknesses of the upper side plate and the lower side plate; The upper battery cell assembly comprises a plurality of upper battery cells arranged side by side between the upper side plate and the middle clamping plate, and each upper battery cell is bonded with the upper side plate and the middle clamping plate respectively by means of heat-conducting glue, and the two module end plates clamp the upper battery cell assembly; The lower battery cell assembly comprises a plurality of lower battery cells arranged side by side between the lower side plate and the middle clamping plate, and each lower battery cell is bonded with the lower side plate and the middle clamping plate respectively by means of heat-conducting glue, and the two module end plates clamp the lower battery cell assembly.

2. The dual layer battery module of claim 1, wherein: Two upper insulating strips are arranged between the upper battery cell assembly and the upper side plate, and the two upper insulating strips protrude from the two sides of the upper side plate respectively.

3. The dual layer battery module of claim 1, wherein: Two lower insulating strips are arranged between the lower battery cell assembly and the lower side plate, and the two lower insulating strips protrude from the two sides of the lower side plate respectively.

4. The dual layer battery module of claim 1, wherein: A middle insulating strip is arranged on each side of the middle clamping plate, the middle insulating strip covers the side edges of the middle clamping plate, the upper side of the middle insulating strip is clamped between the middle clamping plate and the upper battery cell assembly, and the lower side of the middle insulating strip is clamped between the middle clamping plate and the lower battery cell assembly.

5. The dual layer battery module of claim 1, wherein: Each end of the middle clamping plate is provided with two connecting portions, and the two module end plates are provided with two clearances corresponding to the middle connecting surface; the two connecting portions of each end of the middle clamping plate pass through the two clearances of one module end plate respectively and are connected with the middle connecting surface of the module end plate.

6. The dual layer battery module of claim 1, wherein: The thickness of the middle clamping plate is 1.5-4 mm.

7. The dual layer battery module of claim 1, wherein: The module end plate has at least two through holes penetrating the middle connecting surface and the lower connecting surface of the module end plate.

8. The dual layer battery module of claim 1, wherein: An upper buffer pad is arranged between the upper battery cell assembly and the two module end plates.

9. The bi-layer battery module of claim 1 or 8, wherein: A lower buffer pad is arranged between the lower battery cell assembly and the two module end plates.

10. The dual layer battery module of claim 9, wherein: The upper buffer pad and the lower buffer pad are both made of foam.